diff --git a/src/main/java/ru/kirillius/pf/sdn/PfSdnApplication.java b/src/main/java/ru/kirillius/pf/sdn/PfSdnApplication.java
new file mode 100644
index 0000000..b50cc95
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/PfSdnApplication.java
@@ -0,0 +1,31 @@
+package ru.kirillius.pf.sdn;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class PfSdnApplication {
+    private final static String DATABASE_FILE = "pfsdn";
+
+    public static void main(String[] args) {
+
+        /*
+        ENV:
+        SERVER_PORT=8080
+        APP_DATA=/var/lib/pfsdn
+
+        ARGS:
+        -Dserver.port=8080
+        -app.data=/var/lib/pfsdn
+         */
+
+        //System.setProperty("server.port", String.valueOf(configData.port()));
+        //System.setProperty("jwt.secret", configData.jwtSecret());
+        var appData = System.getProperty("app.data", ".");
+        System.setProperty("app.datasource.url", "jdbc:h2:file:" + appData + "/" + DATABASE_FILE);
+
+        new SpringApplicationBuilder(PfSdnApplication.class).run(args);
+    }
+
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/Util/CommandLineUtils.java b/src/main/java/ru/kirillius/pf/sdn/Util/CommandLineUtils.java
new file mode 100644
index 0000000..315f7c1
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/Util/CommandLineUtils.java
@@ -0,0 +1,22 @@
+package ru.kirillius.pf.sdn.Util;
+
+import java.util.Arrays;
+
+/**
+ * Utility methods for parsing command-line arguments used by the launcher.
+ */
+public final class CommandLineUtils {
+    private CommandLineUtils() {
+    }
+
+    /**
+     * Returns the first command-line argument starting with the given flag name.
+     */
+    public static String getArgument(String argname, String[] args) {
+        var first = Arrays.stream(args).filter(arg -> arg.startsWith("-" + argname)).findFirst();
+        if (first.isEmpty()) {
+            throw new IllegalArgumentException("Missing required argument: -" + argname);
+        }
+        return first.get().substring(argname.length() + 2);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/Util/IPv4Util.java b/src/main/java/ru/kirillius/pf/sdn/Util/IPv4Util.java
new file mode 100644
index 0000000..eb28c49
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/Util/IPv4Util.java
@@ -0,0 +1,354 @@
+package ru.kirillius.pf.sdn.Util;
+
+import lombok.Getter;
+import lombok.SneakyThrows;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+import java.net.InetAddress;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+
+/**
+ * Helper methods for IPv4 address manipulation and subnet aggregation logic.
+ */
+public class IPv4Util {
+
+    private IPv4Util() {
+    }
+
+    private static final Pattern pattern = Pattern.compile("^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$");
+
+    /**
+     * Ensures the supplied string is a valid IPv4 address.
+     */
+    public static void validateAddress(String address) {
+        if (!pattern.matcher(address).matches()) {
+            throw new IllegalArgumentException("Invalid IPv4 address: " + address);
+        }
+    }
+
+    /**
+     * Ensures the prefix length is within the allowed range 0..32.
+     */
+    public static void validatePrefix(int prefix) {
+        if (prefix < 0 || prefix > 32) {
+            throw new IllegalArgumentException("Invalid IPv4 prefix: " + prefix);
+        }
+    }
+
+
+    /**
+     * Converts a dotted IPv4 address into its numeric representation.
+     */
+    @SneakyThrows
+    public static long ipAddressToLong(String address) {
+        validateAddress(address);
+        var ip = InetAddress.getByName(address);
+        var bytes = ip.getAddress();
+        var result = 0L;
+        for (var b : bytes) {
+            result = (result << 8) | (b & 0xFF);
+        }
+        return result;
+    }
+
+    /**
+     * Returns a bit mask representing the provided prefix length.
+     */
+    public static long calculateMask(int prefixLength) {
+        validatePrefix(prefixLength);
+        return 0xFFFFFFFFL << (32 - prefixLength);
+    }
+
+
+    /**
+     * Converts a numeric IPv4 address into dotted notation.
+     */
+    public static String longToIpAddress(long ipLong) {
+        if (ipLong < 0 || ipLong > 0xFFFFFFFFL) {
+            throw new IllegalArgumentException("Address number should be in range 0 - 4294967295");
+        }
+        return ((ipLong >> 24) & 0xFF) + "." + ((ipLong >> 16) & 0xFF) + "." + ((ipLong >> 8) & 0xFF) + "." + (ipLong & 0xFF);
+    }
+
+    /**
+     * Formats a numeric mask into dotted notation.
+     */
+    public static String maskToString(long maskLong) {
+        return String.format("%d.%d.%d.%d",
+                (maskLong >> 24) & 0xff,
+                (maskLong >> 16) & 0xff,
+                (maskLong >> 8) & 0xff,
+                maskLong & 0xff);
+    }
+
+    /**
+     * Result contract for subnet summarisation operations.
+     */
+    public interface SummarisationResult {
+        /**
+         * Returns the resulting set of subnets after summarisation.
+         */
+        List<IPv4Subnet> getResult();
+
+        /**
+         * Returns the original subnets that were merged during summarisation.
+         */
+        Set<IPv4Subnet> getMergedSubnets();
+    }
+
+    /**
+     * Performs subnet merging strategies based on overlap and utilisation heuristics.
+     */
+    private static class SubnetSummaryUtility implements SummarisationResult {
+
+        @Getter
+        private final List<IPv4Subnet> result;
+        private final Collection<IPv4Subnet> source;
+        @Getter
+        private final Set<IPv4Subnet> mergedSubnets = new HashSet<>();
+
+
+        /**
+         * Builds the summarisation utility with the supplied subnets and usage threshold.
+         */
+        public SubnetSummaryUtility(Collection<IPv4Subnet> subnets, int usePercentage) {
+            source = subnets;
+            result = new ArrayList<>(subnets);
+            summaryOverlapped();
+            mergeNeighbours();
+            summaryWithUsage(usePercentage > 50 ? usePercentage : 51);
+            summaryOverlapped();
+            result.sort(Comparator.comparing(IPv4Subnet::getLongAddress));
+        }
+
+        /**
+         * Removes redundant subnets wholly covered by other subnets.
+         */
+        private void summaryOverlapped() {
+            if (result.size() < 2) {
+                return;
+            }
+            //check subnets overlaps
+            var overlapped = new ArrayList<IPv4Subnet>();
+            var orderedByPrefix = result.stream().sorted(Comparator.comparing(IPv4Subnet::getPrefixLength)).toList();
+            orderedByPrefix.stream()
+                    .filter(subnet -> subnet.getPrefixLength() > 32)
+                    .forEach(parent -> orderedByPrefix.forEach(subnet -> {
+                        if (subnet.equals(parent)) {
+                            return;
+                        }
+                        if (parent.overlaps(subnet)) {
+                            overlapped.add(subnet);
+                            if (source.contains(subnet)) {
+                                mergedSubnets.add(subnet);
+                            }
+                        }
+                    }));
+            overlapped.forEach(result::remove);
+        }
+
+        /**
+         * Attempts to merge adjacent subnets into larger ones while preserving coverage.
+         */
+        private void mergeNeighbours() {
+            if (result.size() < 2) {
+                return;
+            }
+            var availableLengths = result.stream().map(IPv4Subnet::getPrefixLength).collect(Collectors.toSet());
+            for (var length = 32; length > 0; length--) {
+                if (!availableLengths.contains(length)) {
+                    continue;
+                }
+                var finalLength = length;
+                var largerPrefixLength = length - 1;
+                var largerPrefixMask = IPv4Util.calculateMask(largerPrefixLength);
+
+
+                var selectedSubnets = result.stream().filter(subnet -> subnet.getPrefixLength() == finalLength).sorted(Comparator.comparing(IPv4Subnet::getLongAddress)).toList();
+                //проверяем является ли адрес подсети таким же как адрес подсети с перфиксом -1
+                for (var i = 0; i < selectedSubnets.size() - 1; i++) {
+                    var subnet = selectedSubnets.get(i);
+                    var next = selectedSubnets.get(i + 1);
+                    var firstAddress = subnet.getLongAddress();
+                    if (firstAddress != (firstAddress & largerPrefixMask)) {
+                        continue;
+                    }
+                    var largerSubnet = new IPv4Subnet(subnet.getAddress(), largerPrefixLength);
+                    if (largerSubnet.overlaps(next)) {
+                        //если подсеть перекрывает соседнюю, то удаляем обе и добавляем новую
+                        availableLengths.add(largerPrefixLength);
+                        result.remove(subnet);
+                        result.remove(next);
+                        result.add(largerSubnet);
+                        if (source.contains(subnet)) {
+                            mergedSubnets.add(subnet);
+                        }
+                        if (source.contains(next)) {
+                            mergedSubnets.add(next);
+                        }
+                        i++;
+                    }
+                }
+            }
+        }
+
+        /**
+         * Returns the smallest prefix length currently present in the result set.
+         */
+        private int findMinPrefixLength() {
+            return result.stream().mapToInt(IPv4Subnet::getPrefixLength).min().getAsInt();
+        }
+
+        /**
+         * Returns the largest prefix length currently present in the result set.
+         */
+        private int findMaxPrefixLength() {
+            return result.stream().mapToInt(IPv4Subnet::getPrefixLength).max().getAsInt();
+        }
+
+        /**
+         * Returns the smallest network address found in the result set.
+         */
+        private long findMinAddress() {
+            return result.stream().mapToLong(IPv4Subnet::getLongAddress).min().getAsLong();
+        }
+
+        /**
+         * Returns the largest network address found in the result set.
+         */
+        private long findMaxAddress() {
+            return result.stream().mapToLong(IPv4Subnet::getLongAddress).max().getAsLong();
+        }
+
+        /**
+         * Produces candidate subnets capable of covering the current set at the given prefix length.
+         */
+        private List<IPv4Subnet> findMergeCandidatesForPrefixLength(int prefixLength) {
+            //создаём подсети-кандидаты, которые покроют наш список
+            var maxAddress = findMaxAddress();
+
+            var mask = IPv4Util.calculateMask(prefixLength);
+            var firstAddress = (findMinAddress() & mask);
+            var lastAddress = (maxAddress & mask);
+
+            var candidates = new ArrayList<IPv4Subnet>();
+            var candidateAddress = firstAddress;
+            do {
+                var candidate = new IPv4Subnet(candidateAddress, prefixLength);
+                candidates.add(candidate);
+                if (candidates.size() > result.size()) {
+                    throw new IllegalStateException("Too many IPv4 addresses when trying to summary " + result.size() + " subnets");
+                }
+                //поиск следующего адреса кандидата
+                var nextAddress = candidateAddress + candidate.count();
+                var nextSubnet = result.stream().filter(subnet -> {
+                    var address = subnet.getLongAddress();
+                    return subnet.getPrefixLength() > prefixLength && address >= nextAddress && address <= maxAddress;
+                }).min(Comparator.comparingLong(IPv4Subnet::getLongAddress)).stream().findFirst();
+                if (nextSubnet.isEmpty()) {
+                    break;
+                }
+                candidateAddress = IPv4Util.createSubnetOverlapping(nextSubnet.get().getLongAddress(), prefixLength).getLongAddress();
+            } while (candidateAddress <= lastAddress);
+            return candidates;
+        }
+
+        /**
+         * Tests whether the candidate subnet meets utilisation requirements and performs the merge.
+         */
+        private boolean testCandidate(IPv4Subnet candidate, int usePercentage) {
+            if (result.contains(candidate)) {
+                return false;
+            }
+            var min = candidate.getLongAddress();
+            var max = candidate.getLongAddress() + candidate.count() - 1;
+            var overlapped = new ArrayList<IPv4Subnet>();
+            var used = new AtomicLong(0L);
+            result.forEach(child -> {
+                if (child.getLongAddress() < min || child.getLongAddress() > max) {
+                    return;
+                }
+
+                if (candidate.overlaps(child)) {
+                    overlapped.add(child);
+                    used.addAndGet(child.count());
+                }
+            });
+
+            if (100.0 * used.get() / candidate.count() >= usePercentage) {
+                //подсеть подходит под критерий
+                overlapped.forEach(subnet -> {
+                    if (source.contains(subnet)) {
+                        mergedSubnets.add(subnet);
+                    }
+                });
+                result.removeAll(overlapped);
+                result.add(candidate);
+                return true;
+            }
+            return false;
+        }
+
+        /**
+         * Iteratively merges subnets that satisfy the utilisation threshold.
+         */
+        private void summaryWithUsage(int usePercentage) {
+            if (result.isEmpty() || usePercentage >= 100 || usePercentage <= 0) {
+                return;
+            }
+
+            var found = new AtomicBoolean();
+            do {
+                found.set(false);
+                if (result.size() < 2) {
+                    break;
+                }
+                var prefixMin = findMinPrefixLength();
+                var prefixMax = findMaxPrefixLength();
+                for (var testPrefixLength = prefixMin - 1; testPrefixLength < prefixMax; testPrefixLength++) {
+                    //создаём подсети-кандидаты, которые покроют наш список
+                    var candidates = findMergeCandidatesForPrefixLength(testPrefixLength);
+
+                    candidates.forEach(candidate -> {
+                        if (testCandidate(candidate, usePercentage)) {
+                            found.set(true);
+                        }
+                    });
+
+                    if (candidates.stream().anyMatch(result::contains)) {
+                        //если был добавлен хотя бы 1 кандидат, то нужно пересчитать maxPrefix
+                        prefixMax = result.stream().mapToInt(IPv4Subnet::getPrefixLength).max().getAsInt();
+                    }
+                }
+            } while (found.get());
+        }
+    }
+
+    /**
+     * Summaries the provided subnets using merging heuristics and utilisation thresholds.
+     */
+    public static SummarisationResult summarySubnets(Collection<IPv4Subnet> subnets, int usePercentage) {
+        return new SubnetSummaryUtility(subnets, usePercentage);
+    }
+
+    /**
+     * Creates a subnet covering the given address at the specified prefix length.
+     */
+    private static IPv4Subnet createSubnetOverlapping(long address, int prefixLength) {
+        return new IPv4Subnet(address & IPv4Util.calculateMask(prefixLength), prefixLength);
+    }
+
+    /**
+     * Returns the number of addresses represented by a prefix length.
+     */
+    public static long calculateCountForPrefixLength(long prefixLength) {
+        return 1L << (32L - prefixLength);
+    }
+
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/Util/Wait.java b/src/main/java/ru/kirillius/pf/sdn/Util/Wait.java
new file mode 100644
index 0000000..5461240
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/Util/Wait.java
@@ -0,0 +1,41 @@
+package ru.kirillius.pf.sdn.Util;
+
+import java.time.Duration;
+import java.util.function.Supplier;
+
+/**
+ * Provides blocking wait utilities for polling boolean conditions with interruption support.
+ */
+public final class Wait {
+    private Wait() {
+        throw new AssertionError();
+    }
+
+    /**
+     * Blocks until the supplied condition becomes true or the thread is interrupted.
+     */
+    public static void until(Supplier<Boolean> condition) throws InterruptedException {
+        if (condition == null) {
+            return;
+        }
+
+        while (!condition.get() && !Thread.currentThread().isInterrupted()) {
+            Thread.sleep(Duration.ofSeconds(1));
+        }
+    }
+
+    /**
+     * Blocks while the supplied condition remains true or until interrupted.
+     */
+    public static void when(Supplier<Boolean> condition) throws InterruptedException {
+        if (condition == null) {
+            return;
+        }
+
+        while (condition.get() && !Thread.currentThread().isInterrupted()) {
+            Thread.sleep(Duration.ofSeconds(1));
+        }
+    }
+
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/Util/WorkerUtils.java b/src/main/java/ru/kirillius/pf/sdn/Util/WorkerUtils.java
new file mode 100644
index 0000000..488f07a
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/Util/WorkerUtils.java
@@ -0,0 +1,39 @@
+package ru.kirillius.pf.sdn.Util;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.function.BooleanSupplier;
+import java.util.function.Supplier;
+
+public class WorkerUtils {
+    @SuppressWarnings("BusyWait")
+    public static void waitForCondition(BooleanSupplier condition, long checkInterval) {
+        while (!Thread.interrupted() && !condition.getAsBoolean()) {
+            try {
+                Thread.sleep(checkInterval);
+            } catch (InterruptedException e) {
+                return;
+            }
+        }
+    }
+
+    public static void waitForCondition(BooleanSupplier condition) {
+        waitForCondition(condition, 1000);
+    }
+
+    public static void waitForTimer(Supplier<Duration> duration) {
+        var start = Instant.now();
+        waitForCondition(() -> Duration.between(start, Instant.now()).compareTo(duration.get()) > 0, 1000);
+    }
+
+    public abstract static class LoopedWorker implements Runnable {
+        protected abstract void doWork();
+
+        @Override
+        public final void run() {
+            while (!Thread.interrupted()) {
+                doWork();
+            }
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolver.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolver.java
new file mode 100644
index 0000000..f011b59
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolver.java
@@ -0,0 +1,16 @@
+package ru.kirillius.pf.sdn.api.Networking;
+
+import ru.kirillius.pf.sdn.api.dto.IPQueryInfo;
+
+import java.net.Inet4Address;
+import java.util.List;
+import java.util.concurrent.Future;
+
+public interface AutonomousSystemResolver {
+
+    void registerApi(AutonomousSystemResolverApi api);
+
+    Future<List<IPv4Subnet>> getPrefixes(int as);
+
+    Future<IPQueryInfo> getAddressInfo(Inet4Address address);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolverApi.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolverApi.java
new file mode 100644
index 0000000..862c3f2
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/AutonomousSystemResolverApi.java
@@ -0,0 +1,19 @@
+package ru.kirillius.pf.sdn.api.Networking;
+
+import ru.kirillius.pf.sdn.api.dto.IPQueryInfo;
+
+import java.net.Inet4Address;
+import java.util.List;
+
+/**
+ * Abstraction for retrieving prefixes announced by a specific autonomous system.
+ */
+public interface AutonomousSystemResolverApi {
+    /**
+     * Returns IPv4 subnets originated by the provided autonomous system number.
+     */
+    List<IPv4Subnet> getPrefixes(int as);
+
+    IPQueryInfo queryAddress(Inet4Address address);
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/DomainResolver.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/DomainResolver.java
new file mode 100644
index 0000000..144ba5d
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/DomainResolver.java
@@ -0,0 +1,30 @@
+package ru.kirillius.pf.sdn.api.Networking;
+
+import java.net.Inet4Address;
+import java.util.List;
+import java.util.concurrent.Future;
+
+public interface DomainResolver {
+    /**
+     * Resolve domain on specified server
+     * @param domain
+     * @param server
+     * @return
+     */
+    Future<List<Inet4Address>> getAddresses(String domain, Inet4Address server);
+
+    /**
+     * Resolve domain using default servers
+     * @param domain
+     * @return
+     */
+    Future<List<Inet4Address>> getAddresses(String domain);
+
+    /**
+     * Resolve domain using specified servers
+     * @param domain
+     * @param servers
+     * @return
+     */
+    Future<List<Inet4Address>> getAddresses(String domain, List<Inet4Address> servers);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/IPv4Subnet.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/IPv4Subnet.java
new file mode 100644
index 0000000..4c4148b
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/IPv4Subnet.java
@@ -0,0 +1,122 @@
+package ru.kirillius.pf.sdn.api.Networking;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import lombok.Getter;
+import ru.kirillius.pf.sdn.Util.IPv4Util;
+
+import java.net.Inet4Address;
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+/**
+ * Immutable representation of an IPv4 subnet serialized as a CIDR string.
+ */
+public class IPv4Subnet {
+
+    @Getter
+    private final long longAddress;
+    @Getter
+    private final int prefixLength;
+
+    /**
+     * Compares two subnets for equality based on address and prefix length.
+     */
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || getClass() != o.getClass()) return false;
+        IPv4Subnet that = (IPv4Subnet) o;
+        return longAddress == that.longAddress && prefixLength == that.prefixLength;
+    }
+
+    /**
+     * Computes a hash code using address and prefix length.
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(longAddress, prefixLength);
+    }
+
+    /**
+     * Parses a subnet from textual CIDR notation.
+     */
+    @JsonCreator
+    public IPv4Subnet(String subnet) {
+        var split = subnet.split(Pattern.quote("/"));
+        if (split.length != 2) {
+            throw new IllegalArgumentException("Invalid subnet: " + subnet);
+        }
+        var prefix = Integer.parseInt(split[1]);
+        IPv4Util.validatePrefix(prefix);
+
+        longAddress = IPv4Util.ipAddressToLong(split[0]);
+        prefixLength = prefix;
+    }
+
+    public IPv4Subnet(Inet4Address address, int prefixLength) {
+        IPv4Util.validatePrefix(prefixLength);
+        longAddress = IPv4Util.ipAddressToLong(address.getHostAddress());
+        this.prefixLength = prefixLength;
+    }
+
+    /**
+     * Creates a subnet from a numeric address and prefix length.
+     */
+    public IPv4Subnet(long longAddress, int prefixLength) {
+        this.longAddress = longAddress;
+        this.prefixLength = prefixLength;
+    }
+
+    /**
+     * Creates a subnet from a dotted address string and prefix length.
+     */
+    public IPv4Subnet(String address, int prefixLength) {
+        IPv4Util.validatePrefix(prefixLength);
+
+        this.longAddress = IPv4Util.ipAddressToLong(address);
+        this.prefixLength = prefixLength;
+    }
+
+    /**
+     * Calculates the number of addresses within the subnet.
+     */
+    public long count() {
+        return IPv4Util.calculateCountForPrefixLength(prefixLength);
+    }
+
+    /**
+     * Returns the dotted-decimal representation of the subnet's network address.
+     */
+    public String getAddress() {
+        return IPv4Util.longToIpAddress(longAddress);
+    }
+
+    /**
+     * Formats the subnet using CIDR notation.
+     */
+    @JsonValue
+    @Override
+    public String toString() {
+        return getAddress() + '/' + prefixLength;
+    }
+
+    /**
+     * Determines whether this subnet overlaps with another.
+     */
+    public boolean overlaps(IPv4Subnet subnet) {
+        var minPrefixLength = Math.min(prefixLength, subnet.prefixLength);
+        var commonMask = IPv4Util.calculateMask(minPrefixLength);
+        if (minPrefixLength != prefixLength) {
+            return false; //can't overlap larger prefix
+        }
+
+        return (longAddress & commonMask) == (subnet.longAddress & commonMask);
+    }
+
+    public boolean contains(String address) {
+        var longAddress = IPv4Util.ipAddressToLong(address);
+        var commonMask = IPv4Util.calculateMask(prefixLength);
+        return (this.longAddress & commonMask) == (longAddress & commonMask);
+    }
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/NetworkScope.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/NetworkScope.java
new file mode 100644
index 0000000..92f69b8
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/NetworkScope.java
@@ -0,0 +1,62 @@
+package ru.kirillius.pf.sdn.api.Networking;
+
+import lombok.*;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Container for grouped network identifiers used to configure filtering and subscriptions.
+ */
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class NetworkScope {
+    @Getter
+    @Setter
+    private String description = "";
+    @Getter
+    @Setter
+    private List<Integer> ASN = new ArrayList<>();
+    @Getter
+    @Setter
+    private List<IPv4Subnet> subnets = new ArrayList<>();
+    @Getter
+    @Setter
+    private List<String> domains = new ArrayList<>();
+
+    @Getter
+    @Setter
+    private boolean resolveDomains = false;
+
+    @Override
+    public boolean equals(Object o) {
+        if (!(o instanceof NetworkScope that)) return false;
+        return Objects.equals(ASN, that.ASN) && Objects.equals(subnets, that.subnets) && Objects.equals(domains, that.domains);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ASN, subnets, domains);
+    }
+
+    /**
+     * Clears all stored network identifiers.
+     */
+    public void clear() {
+        ASN.clear();
+        subnets.clear();
+        domains.clear();
+    }
+
+    /**
+     * Adds all resources from the provided bundle into this bundle.
+     */
+    public void add(NetworkScope networkScope) {
+        ASN.addAll(networkScope.getASN());
+        subnets.addAll(networkScope.getSubnets());
+        domains.addAll(networkScope.getDomains());
+    }
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/CacheFallbackProviderProtocol.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/CacheFallbackProviderProtocol.java
new file mode 100644
index 0000000..f86daca
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/CacheFallbackProviderProtocol.java
@@ -0,0 +1,28 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import lombok.RequiredArgsConstructor;
+import ru.kirillius.pf.sdn.entity.SubscriptionProviderConfig;
+import ru.kirillius.pf.sdn.repository.SubscriptionCacheRepository;
+
+import java.util.Collections;
+
+@RequiredArgsConstructor
+public class CacheFallbackProviderProtocol implements SubscriptionProviderProtocol {
+    @Override
+    public String getIdentifier() {
+        return "Fallback:cache";
+    }
+
+    @Override
+    public PropertyCollection getProperties() {
+        return new PropertyCollection();
+    }
+
+    private final SubscriptionCacheRepository cacheRepository;
+
+    @Override
+    public SubscriptionQueryResult query(SubscriptionProviderConfig config) {
+        var found = cacheRepository.getAllByNameStartsWith(config.getName());
+        return new SubscriptionQueryResult(Collections.unmodifiableList(found), Collections.emptyList());
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Descriptor.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Descriptor.java
new file mode 100644
index 0000000..e7117d7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Descriptor.java
@@ -0,0 +1,4 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+public record Descriptor(PropertyType type, boolean list, String description) {
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyCollection.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyCollection.java
new file mode 100644
index 0000000..c5240e7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyCollection.java
@@ -0,0 +1,7 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import java.util.HashMap;
+
+public class PropertyCollection extends HashMap<String, Descriptor> {
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyType.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyType.java
new file mode 100644
index 0000000..6c1c862
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/PropertyType.java
@@ -0,0 +1,9 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+public enum PropertyType {
+    Integer,
+    String,
+    Boolean,
+    Float,
+    Subscription
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Subscription.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Subscription.java
new file mode 100644
index 0000000..058c89c
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/Subscription.java
@@ -0,0 +1,9 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+public interface Subscription {
+    String getName();
+
+    NetworkScope getScope();
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionFactory.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionFactory.java
new file mode 100644
index 0000000..1bb9dbd
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionFactory.java
@@ -0,0 +1,7 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+public interface SubscriptionFactory {
+    Subscription create(String name, NetworkScope scope);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProvider.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProvider.java
new file mode 100644
index 0000000..4b2045b
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProvider.java
@@ -0,0 +1,32 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import lombok.Builder;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import ru.kirillius.pf.sdn.entity.SubscriptionProviderConfig;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+@Slf4j
+@RequiredArgsConstructor
+@Builder
+public class SubscriptionProvider {
+    private final SubscriptionProviderProtocol protocol;
+    private final SubscriptionProviderConfig config;
+
+    public List<Subscription> getSubscriptions() {
+        return Collections.unmodifiableList(subscriptions);
+    }
+
+    private final List<Subscription> subscriptions = new ArrayList<>();
+
+    public List<Subscription> update() {
+        var result = protocol.query(config);
+        subscriptions.clear();
+        subscriptions.addAll(result.subscriptions());
+        return result.updated();
+    }
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProviderProtocol.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProviderProtocol.java
new file mode 100644
index 0000000..79ec238
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionProviderProtocol.java
@@ -0,0 +1,11 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import ru.kirillius.pf.sdn.entity.SubscriptionProviderConfig;
+
+public interface SubscriptionProviderProtocol {
+    String getIdentifier();
+
+    PropertyCollection getProperties();
+
+    SubscriptionQueryResult query(SubscriptionProviderConfig config);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionQueryResult.java b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionQueryResult.java
new file mode 100644
index 0000000..763d331
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/Networking/Subscriptions/SubscriptionQueryResult.java
@@ -0,0 +1,6 @@
+package ru.kirillius.pf.sdn.api.Networking.Subscriptions;
+
+import java.util.List;
+
+public record SubscriptionQueryResult(List<Subscription> subscriptions, List<Subscription> updated) {
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/dto/IPQueryInfo.java b/src/main/java/ru/kirillius/pf/sdn/api/dto/IPQueryInfo.java
new file mode 100644
index 0000000..1868a3a
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/dto/IPQueryInfo.java
@@ -0,0 +1,15 @@
+package ru.kirillius.pf.sdn.api.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+import java.util.List;
+
+@Builder
+public class IPQueryInfo {
+    @Getter
+    private List<Integer> ASN;
+    @Getter
+    private List<IPv4Subnet> prefixes;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/Action.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/Action.java
new file mode 100644
index 0000000..9344254
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/Action.java
@@ -0,0 +1,44 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.SneakyThrows;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+import java.util.Properties;
+import java.util.function.Function;
+
+@Builder
+public class Action implements Function<NetworkScope, NetworkScope> {
+
+    private PipelineFunction function;
+
+    public Action(PipelineFunction function, Class<? extends PipelineFunction> functionClass, Properties properties) {
+        this.function = function;
+        this.functionClass = functionClass;
+        this.properties = properties;
+        instantiateFunction();
+    }
+
+    @SneakyThrows
+    private void instantiateFunction() {
+        function = functionClass.getConstructor().newInstance();
+    }
+
+    public void setFunctionClass(Class<? extends PipelineFunction> functionClass) {
+        this.functionClass = functionClass;
+        instantiateFunction();
+    }
+
+    @Getter
+    private Class<? extends PipelineFunction> functionClass;
+    @Getter
+    @Setter
+    private Properties properties;
+
+    @Override
+    public NetworkScope apply(NetworkScope source) {
+        return function.apply(source, properties);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/InputResource.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/InputResource.java
new file mode 100644
index 0000000..5ae223a
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/InputResource.java
@@ -0,0 +1,5 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+public interface InputResource  extends PipelineFunction {
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/OutputResource.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/OutputResource.java
new file mode 100644
index 0000000..71583d7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/OutputResource.java
@@ -0,0 +1,7 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+public interface OutputResource extends PipelineFunction {
+    void apply(NetworkScope config);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/PipelineFunction.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/PipelineFunction.java
new file mode 100644
index 0000000..deb83c3
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/PipelineFunction.java
@@ -0,0 +1,9 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+import java.util.Properties;
+
+public interface PipelineFunction {
+    NetworkScope apply(NetworkScope source, Properties properties);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ProcessingPipeline.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ProcessingPipeline.java
new file mode 100644
index 0000000..5a3ddbb
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ProcessingPipeline.java
@@ -0,0 +1,52 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+@AllArgsConstructor
+@NoArgsConstructor
+public class ProcessingPipeline {
+    @Getter
+    @Setter
+    private List<StartCondition> startConditions;
+
+    private final AtomicBoolean running = new AtomicBoolean(false);
+    @Getter
+    @Setter
+    private List<Action> actions;
+    private AtomicInteger currentStep = new AtomicInteger(0);
+
+    public boolean isRunning() {
+        return running.get();
+    }
+
+    public int getStepCount() {
+        return actions.size();
+    }
+
+    public int getCurrentStep() {
+        return currentStep.get();
+    }
+
+    public void execute() {
+        running.set(true);
+        currentStep.set(0);
+        try {
+            var config = new AtomicReference<>(new NetworkScope());
+            actions.forEach(action -> {
+                currentStep.incrementAndGet();
+                config.set(action.apply(config.get()));
+            });
+        } finally {
+            running.set(false);
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ResourceProcessor.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ResourceProcessor.java
new file mode 100644
index 0000000..8e64e07
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/ResourceProcessor.java
@@ -0,0 +1,8 @@
+
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+public interface ResourceProcessor extends PipelineFunction {
+    NetworkScope apply(NetworkScope config);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/StartCondition.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/StartCondition.java
new file mode 100644
index 0000000..17df692
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/StartCondition.java
@@ -0,0 +1,13 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.Properties;
+
+@Getter
+@Setter
+public class StartCondition {
+    private TriggerType trigger;
+    private Properties properties;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/api/pipeline/TriggerType.java b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/TriggerType.java
new file mode 100644
index 0000000..419e1e5
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/api/pipeline/TriggerType.java
@@ -0,0 +1,8 @@
+package ru.kirillius.pf.sdn.api.pipeline;
+
+public enum TriggerType {
+    Manual,
+    Interval,
+    OnSubscriptionUpdate,
+    OnStart
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/config/BeanConfiguration.java b/src/main/java/ru/kirillius/pf/sdn/config/BeanConfiguration.java
new file mode 100644
index 0000000..407b6b6
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/config/BeanConfiguration.java
@@ -0,0 +1,23 @@
+package ru.kirillius.pf.sdn.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+@Configuration
+public class BeanConfiguration {
+
+    @Bean
+    public ExecutorService executor() {
+        return Executors.newFixedThreadPool(Math.max(Runtime.getRuntime().availableProcessors() * 2, 10));
+    }
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/config/DataInitializer.java b/src/main/java/ru/kirillius/pf/sdn/config/DataInitializer.java
new file mode 100644
index 0000000..f09a040
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/config/DataInitializer.java
@@ -0,0 +1,19 @@
+package ru.kirillius.pf.sdn.config;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+import ru.kirillius.pf.sdn.service.AuthService;
+
+@Component
+@RequiredArgsConstructor
+public class DataInitializer {
+
+    private final AuthService authService;
+
+    @EventListener(ApplicationReadyEvent.class)
+    public void init() {
+        authService.createDefaultUserIfAbsent();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/config/JwtService.java b/src/main/java/ru/kirillius/pf/sdn/config/JwtService.java
new file mode 100644
index 0000000..b9abbb1
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/config/JwtService.java
@@ -0,0 +1,50 @@
+package ru.kirillius.pf.sdn.config;
+
+import io.jsonwebtoken.Claims;
+import io.jsonwebtoken.JwtException;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.security.Keys;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import javax.crypto.SecretKey;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.Optional;
+
+@Component
+public class JwtService {
+
+    private final SecretKey key;
+    private final long expirationMs;
+
+    public JwtService(
+            @Value("${jwt.secret}") String secret,
+            @Value("${jwt.expiration-ms:2592000000}") long expirationMs) {
+        this.key = Keys.hmacShaKeyFor(secret.getBytes(StandardCharsets.UTF_8));
+        this.expirationMs = expirationMs;
+    }
+
+    public String generateToken(Long userId) {
+        Date now = new Date();
+        return Jwts.builder()
+                .subject(String.valueOf(userId))
+                .issuedAt(now)
+                .expiration(new Date(now.getTime() + expirationMs))
+                .signWith(key)
+                .compact();
+    }
+
+    public Optional<Long> validateToken(String token) {
+        try {
+            Claims claims = Jwts.parser()
+                    .verifyWith(key)
+                    .build()
+                    .parseSignedClaims(token)
+                    .getPayload();
+            return Optional.of(Long.parseLong(claims.getSubject()));
+        } catch (JwtException | NumberFormatException e) {
+            return Optional.empty();
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/config/WebConfig.java b/src/main/java/ru/kirillius/pf/sdn/config/WebConfig.java
new file mode 100644
index 0000000..846bbd3
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/config/WebConfig.java
@@ -0,0 +1,16 @@
+package ru.kirillius.pf.sdn.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.format.FormatterRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addFormatters(FormatterRegistry registry) {
+        registry.addConverter(String.class, IPv4Subnet.class, IPv4Subnet::new);
+        registry.addConverter(IPv4Subnet.class, String.class, IPv4Subnet::toString);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/controller/ApiTokenController.java b/src/main/java/ru/kirillius/pf/sdn/controller/ApiTokenController.java
new file mode 100644
index 0000000..46365b7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/controller/ApiTokenController.java
@@ -0,0 +1,76 @@
+package ru.kirillius.pf.sdn.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import ru.kirillius.pf.sdn.dto.ApiTokenResponse;
+import ru.kirillius.pf.sdn.dto.CreateApiTokenRequest;
+import ru.kirillius.pf.sdn.dto.ErrorResponse;
+import ru.kirillius.pf.sdn.service.AuthService;
+import ru.kirillius.pf.sdn.service.SessionService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/tokens")
+@RequiredArgsConstructor
+public class ApiTokenController {
+
+    private final AuthService authService;
+    private final SessionService sessionService;
+
+    @PostMapping
+    public ResponseEntity<?> create(
+            @RequestHeader("Authorization") String authHeader,
+            @RequestBody CreateApiTokenRequest request) {
+
+        var maybeUserId = sessionService.resolveUserId(authHeader);
+        if (maybeUserId.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Invalid or missing token"));
+        }
+
+        if (request.getName() == null || request.getName().isBlank()) {
+            return ResponseEntity.badRequest()
+                    .body(new ErrorResponse("Name is required"));
+        }
+
+        String rawToken = authService.generateApiToken(maybeUserId.get(), request.getName().trim());
+        return ResponseEntity.ok(new ApiTokenResponse(null, request.getName().trim(), rawToken, true, null, null));
+    }
+
+    @GetMapping
+    public ResponseEntity<?> list(@RequestHeader("Authorization") String authHeader) {
+        var maybeUserId = sessionService.resolveUserId(authHeader);
+        if (maybeUserId.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Invalid or missing token"));
+        }
+
+        var tokens = authService.getUserApiTokens(maybeUserId.get()).stream()
+                .map(t -> new ApiTokenResponse(t.getId(), t.getName(), null, t.isEnabled(), t.getCreatedAt(), t.getLastUsedAt()))
+                .toList();
+        return ResponseEntity.ok(tokens);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<?> delete(
+            @RequestHeader("Authorization") String authHeader,
+            @PathVariable Long id) {
+
+        var maybeUserId = sessionService.resolveUserId(authHeader);
+        if (maybeUserId.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Invalid or missing token"));
+        }
+
+        boolean deleted = authService.deleteApiToken(id, maybeUserId.get());
+        if (!deleted) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND)
+                    .body(new ErrorResponse("Token not found"));
+        }
+
+        return ResponseEntity.noContent().build();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/controller/AuthController.java b/src/main/java/ru/kirillius/pf/sdn/controller/AuthController.java
new file mode 100644
index 0000000..3deb898
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/controller/AuthController.java
@@ -0,0 +1,68 @@
+package ru.kirillius.pf.sdn.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import ru.kirillius.pf.sdn.dto.AuthResponse;
+import ru.kirillius.pf.sdn.dto.ChangePasswordRequest;
+import ru.kirillius.pf.sdn.dto.ErrorResponse;
+import ru.kirillius.pf.sdn.dto.LoginRequest;
+import ru.kirillius.pf.sdn.service.AuthService;
+import ru.kirillius.pf.sdn.service.SessionService;
+
+@RestController
+@RequestMapping("/api/auth")
+@RequiredArgsConstructor
+public class AuthController {
+
+    private final AuthService authService;
+    private final SessionService sessionService;
+
+    @PostMapping("/login")
+    public ResponseEntity<?> login(@RequestBody LoginRequest request) {
+        return authService.login(request.getUsername(), request.getPassword())
+                .<ResponseEntity<?>>map(token -> ResponseEntity.ok(new AuthResponse(token, request.getUsername())))
+                .orElse(ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                        .body(new ErrorResponse("Invalid username or password")));
+    }
+
+    @PostMapping("/logout")
+    public ResponseEntity<?> logout(@RequestHeader("Authorization") String authHeader) {
+        var maybeToken = sessionService.extractToken(authHeader);
+        if (maybeToken.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Missing or invalid Authorization header"));
+        }
+        sessionService.invalidate(maybeToken.get());
+        return ResponseEntity.ok().build();
+    }
+
+    @PostMapping("/change-password")
+    public ResponseEntity<?> changePassword(
+            @RequestHeader("Authorization") String authHeader,
+            @RequestBody ChangePasswordRequest request) {
+
+        var maybeToken = sessionService.extractToken(authHeader);
+        if (maybeToken.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Missing or invalid Authorization header"));
+        }
+
+        String token = maybeToken.get();
+        var maybeUserId = authService.validateToken(token);
+        if (maybeUserId.isEmpty()) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(new ErrorResponse("Invalid token"));
+        }
+
+        boolean changed = authService.changePassword(maybeUserId.get(), request.getOldPassword(), request.getNewPassword());
+        if (changed) {
+            sessionService.invalidate(token);
+            return ResponseEntity.ok(new AuthResponse(null, null));
+        }
+
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST)
+                .body(new ErrorResponse("Old password is incorrect"));
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/ApiTokenResponse.java b/src/main/java/ru/kirillius/pf/sdn/dto/ApiTokenResponse.java
new file mode 100644
index 0000000..3621e33
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/ApiTokenResponse.java
@@ -0,0 +1,19 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class ApiTokenResponse {
+    private Long id;
+    private String name;
+    private String token;
+    private boolean enabled;
+    private LocalDateTime createdAt;
+    private LocalDateTime lastUsedAt;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/AuthResponse.java b/src/main/java/ru/kirillius/pf/sdn/dto/AuthResponse.java
new file mode 100644
index 0000000..6646e57
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/AuthResponse.java
@@ -0,0 +1,13 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class AuthResponse {
+    private String token;
+    private String username;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/ChangePasswordRequest.java b/src/main/java/ru/kirillius/pf/sdn/dto/ChangePasswordRequest.java
new file mode 100644
index 0000000..610bb53
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/ChangePasswordRequest.java
@@ -0,0 +1,15 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class ChangePasswordRequest {
+    private String oldPassword;
+    private String newPassword;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/CreateApiTokenRequest.java b/src/main/java/ru/kirillius/pf/sdn/dto/CreateApiTokenRequest.java
new file mode 100644
index 0000000..3667b09
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/CreateApiTokenRequest.java
@@ -0,0 +1,14 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CreateApiTokenRequest {
+    private String name;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/ErrorResponse.java b/src/main/java/ru/kirillius/pf/sdn/dto/ErrorResponse.java
new file mode 100644
index 0000000..34b7161
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/ErrorResponse.java
@@ -0,0 +1,12 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class ErrorResponse {
+    private String error;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/LoginRequest.java b/src/main/java/ru/kirillius/pf/sdn/dto/LoginRequest.java
new file mode 100644
index 0000000..0ac778c
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/LoginRequest.java
@@ -0,0 +1,15 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class LoginRequest {
+    private String username;
+    private String password;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/dto/ResolverCacheEntry.java b/src/main/java/ru/kirillius/pf/sdn/dto/ResolverCacheEntry.java
new file mode 100644
index 0000000..e5453b4
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/dto/ResolverCacheEntry.java
@@ -0,0 +1,18 @@
+package ru.kirillius.pf.sdn.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+import java.time.Instant;
+import java.util.HashMap;
+import java.util.Map;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class ResolverCacheEntry {
+    private Instant lastUpdate = Instant.now();
+    private Map<IPv4Subnet, Instant> addresses = new HashMap<>();
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/ApiToken.java b/src/main/java/ru/kirillius/pf/sdn/entity/ApiToken.java
new file mode 100644
index 0000000..4a736e7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/ApiToken.java
@@ -0,0 +1,42 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "api_tokens")
+@Getter
+@Setter
+@NoArgsConstructor
+public class ApiToken {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, length = 100)
+    private String name;
+
+    @Column(nullable = false)
+    private String tokenHash;
+
+    @Column(nullable = false)
+    private Long userId;
+
+    @Column(nullable = false)
+    private boolean enabled = true;
+
+    @Column(nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    private LocalDateTime lastUsedAt;
+
+    @PrePersist
+    protected void onCreate() {
+        this.createdAt = LocalDateTime.now();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/AutonomousSystemCacheEntry.java b/src/main/java/ru/kirillius/pf/sdn/entity/AutonomousSystemCacheEntry.java
new file mode 100644
index 0000000..1e19a9e
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/AutonomousSystemCacheEntry.java
@@ -0,0 +1,30 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+import java.util.List;
+
+@Entity
+@Table(name = "as_cache_entry")
+@Getter
+@Setter
+@NoArgsConstructor
+@Builder
+@AllArgsConstructor
+public class AutonomousSystemCacheEntry {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private int number;
+
+    @ElementCollection
+    @CollectionTable(name = "as_cache_entry_prefixes", joinColumns = @JoinColumn(name = "entry_id"))
+    @Column(name = "prefix", nullable = false)
+    @Convert(converter = IPv4SubnetConverter.class)
+    private List<IPv4Subnet> prefixes;
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/DomainCacheEntry.java b/src/main/java/ru/kirillius/pf/sdn/entity/DomainCacheEntry.java
new file mode 100644
index 0000000..70cb738
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/DomainCacheEntry.java
@@ -0,0 +1,32 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.net.Inet4Address;
+import java.time.Instant;
+
+@Entity
+@Table(name = "domain_cache_entry")
+@Getter
+@Setter
+@NoArgsConstructor
+@Builder
+@AllArgsConstructor
+public class DomainCacheEntry {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String domain;
+
+    @Column(nullable = false)
+    private Instant lastUpdate;
+
+    @Column(nullable = false)
+    private Instant lastSeen;
+
+    @Column(nullable = false)
+    private Inet4Address address;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/IPv4SubnetConverter.java b/src/main/java/ru/kirillius/pf/sdn/entity/IPv4SubnetConverter.java
new file mode 100644
index 0000000..896ee1e
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/IPv4SubnetConverter.java
@@ -0,0 +1,19 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Converter;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+
+@Converter
+public class IPv4SubnetConverter implements AttributeConverter<IPv4Subnet, String> {
+
+    @Override
+    public String convertToDatabaseColumn(IPv4Subnet attribute) {
+        return attribute == null ? null : attribute.toString();
+    }
+
+    @Override
+    public IPv4Subnet convertToEntityAttribute(String dbData) {
+        return dbData == null ? null : new IPv4Subnet(dbData);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/NetworkScopeConverter.java b/src/main/java/ru/kirillius/pf/sdn/entity/NetworkScopeConverter.java
new file mode 100644
index 0000000..78d65ff
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/NetworkScopeConverter.java
@@ -0,0 +1,33 @@
+package ru.kirillius.pf.sdn.entity;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Converter;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+
+@Converter
+public class NetworkScopeConverter implements AttributeConverter<NetworkScope, String> {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    @Override
+    public String convertToDatabaseColumn(NetworkScope attribute) {
+        if (attribute == null) return null;
+        try {
+            return MAPPER.writeValueAsString(attribute);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("Failed to serialize NetworkScope", e);
+        }
+    }
+
+    @Override
+    public NetworkScope convertToEntityAttribute(String dbData) {
+        if (dbData == null) return null;
+        try {
+            return MAPPER.readValue(dbData, NetworkScope.class);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("Failed to deserialize NetworkScope", e);
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionCacheEntry.java b/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionCacheEntry.java
new file mode 100644
index 0000000..5bb69ac
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionCacheEntry.java
@@ -0,0 +1,26 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.Subscription;
+
+@Entity
+@Table(name = "subscription_cache")
+@Getter
+@Setter
+@NoArgsConstructor
+@Builder
+@AllArgsConstructor
+public class SubscriptionCacheEntry implements Subscription {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    @Convert(converter = NetworkScopeConverter.class)
+    private NetworkScope scope;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionProviderConfig.java b/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionProviderConfig.java
new file mode 100644
index 0000000..fd3d184
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/SubscriptionProviderConfig.java
@@ -0,0 +1,40 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.util.Properties;
+
+@Entity
+@Table(name = "subscription_provider_config")
+@Getter
+@Setter
+@NoArgsConstructor
+@Builder
+@AllArgsConstructor
+public class SubscriptionProviderConfig {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    @Column(nullable = false)
+    private String protocolId;
+
+    @ElementCollection
+    @CollectionTable(
+            name = "subscription_provider_config_properties",
+            joinColumns = @JoinColumn(name = "subscription_provider_config_entry_id")
+    )
+    @MapKeyColumn(name = "prop_key")
+    @Column(name = "prop_value", nullable = false)
+    private Properties properties;
+
+    @Column(nullable = false)
+    private String shellScriptBefore;
+
+    @Column(nullable = false)
+    private String shellScriptAfter;
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/entity/User.java b/src/main/java/ru/kirillius/pf/sdn/entity/User.java
new file mode 100644
index 0000000..7296010
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/entity/User.java
@@ -0,0 +1,37 @@
+package ru.kirillius.pf.sdn.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "users")
+@Getter
+@Setter
+@NoArgsConstructor
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true, length = 50)
+    private String username;
+
+    @Column(nullable = false)
+    private String passwordHash;
+
+    @Column(nullable = false)
+    private boolean enabled = true;
+
+    @Column(nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @PrePersist
+    protected void onCreate() {
+        this.createdAt = LocalDateTime.now();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/pipeline/SubscriptionInput.java b/src/main/java/ru/kirillius/pf/sdn/pipeline/SubscriptionInput.java
new file mode 100644
index 0000000..d1fa17f
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/pipeline/SubscriptionInput.java
@@ -0,0 +1,47 @@
+package ru.kirillius.pf.sdn.pipeline;
+
+import lombok.RequiredArgsConstructor;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+import ru.kirillius.pf.sdn.api.pipeline.InputResource;
+import ru.kirillius.pf.sdn.service.DomainUpdaterService;
+import ru.kirillius.pf.sdn.service.SubscriptionService;
+
+import java.net.Inet4Address;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Properties;
+import java.util.regex.Pattern;
+
+@RequiredArgsConstructor
+public class SubscriptionInput implements InputResource {
+
+    private final SubscriptionService subscriptionService;
+    private final DomainUpdaterService domainCacheService;
+
+    @Override
+    public NetworkScope apply(NetworkScope source, Properties properties) {
+        var property = properties.getProperty("property", null);
+        var subscriptions = subscriptionService.getSubscriptions();
+        if (property != null) {
+            var filter = Arrays.stream(property.split(Pattern.quote(","))).filter(s -> !s.isBlank()).toList();
+            subscriptions = subscriptions.stream().filter(s -> filter.contains(s.getName())).toList();
+        }
+
+        var bundle = new NetworkScope();
+        bundle.add(source);
+
+        subscriptions.forEach(subscription -> {
+            var scope = subscription.getScope();
+            bundle.add(scope);
+            var resolved = new ArrayList<Inet4Address>();
+            if (scope.isResolveDomains()) {
+                scope.getDomains().forEach(domain -> resolved.addAll(domainCacheService.getActualAddresses(domain)));
+            }
+            if (!resolved.isEmpty()) {
+                bundle.getSubnets().addAll(resolved.stream().map(ip -> new IPv4Subnet(ip, 32)).toList());
+            }
+        });
+        return bundle;
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/plugins/LocalSubscriptionProvider/LocalSubscriptionProvider.java b/src/main/java/ru/kirillius/pf/sdn/plugins/LocalSubscriptionProvider/LocalSubscriptionProvider.java
new file mode 100644
index 0000000..7dd6dd2
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/plugins/LocalSubscriptionProvider/LocalSubscriptionProvider.java
@@ -0,0 +1,30 @@
+package ru.kirillius.pf.sdn.plugins.LocalSubscriptionProvider;
+
+import lombok.Getter;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.*;
+import ru.kirillius.pf.sdn.entity.SubscriptionProviderConfig;
+
+public class LocalSubscriptionProvider implements SubscriptionProviderProtocol {
+    @Override
+    public String getIdentifier() {
+        return "local-filesystem";
+    }
+
+    @Getter
+    private final PropertyCollection properties;
+
+    public LocalSubscriptionProvider() {
+        properties = new PropertyCollection();
+        properties.put("path", new Descriptor(
+                PropertyType.String,
+                false,
+                "Path to files is local filesystem"
+        ));
+    }
+
+    @Override
+    public SubscriptionQueryResult query(SubscriptionProviderConfig config) {
+
+        return null;
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/plugins/Plugin.java b/src/main/java/ru/kirillius/pf/sdn/plugins/Plugin.java
new file mode 100644
index 0000000..7ffbfe4
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/plugins/Plugin.java
@@ -0,0 +1,6 @@
+package ru.kirillius.pf.sdn.plugins;
+
+public interface Plugin {
+    void onLoad();
+    void onUnload();
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/plugins/PluginLoader.java b/src/main/java/ru/kirillius/pf/sdn/plugins/PluginLoader.java
new file mode 100644
index 0000000..409603a
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/plugins/PluginLoader.java
@@ -0,0 +1,4 @@
+package ru.kirillius.pf.sdn.plugins;
+
+public class PluginLoader {
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/ApiTokenRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/ApiTokenRepository.java
new file mode 100644
index 0000000..fbaa9a3
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/ApiTokenRepository.java
@@ -0,0 +1,16 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.ApiToken;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface ApiTokenRepository extends JpaRepository<ApiToken, Long> {
+
+    List<ApiToken> findByUserId(Long userId);
+
+    Optional<ApiToken> findByIdAndUserId(Long id, Long userId);
+
+    List<ApiToken> findByEnabledTrue();
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/AutonomousSystemCacheRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/AutonomousSystemCacheRepository.java
new file mode 100644
index 0000000..c911008
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/AutonomousSystemCacheRepository.java
@@ -0,0 +1,12 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.AutonomousSystemCacheEntry;
+
+import java.util.Optional;
+
+public interface AutonomousSystemCacheRepository extends JpaRepository<AutonomousSystemCacheEntry, Long> {
+    Optional<AutonomousSystemCacheEntry> findByNumber(int number);
+
+    boolean existsByNumber(int number);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/DomainCacheRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/DomainCacheRepository.java
new file mode 100644
index 0000000..90a275e
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/DomainCacheRepository.java
@@ -0,0 +1,14 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.DomainCacheEntry;
+
+import java.util.List;
+
+public interface DomainCacheRepository extends JpaRepository<DomainCacheEntry, Long> {
+    boolean existsByDomain(String domain);
+
+    List<DomainCacheEntry> findAllByDomain(String domain);
+
+    List<DomainCacheEntry> getAllByDomain(String domain);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionCacheRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionCacheRepository.java
new file mode 100644
index 0000000..477883c
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionCacheRepository.java
@@ -0,0 +1,11 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.SubscriptionCacheEntry;
+
+import java.util.List;
+
+public interface SubscriptionCacheRepository extends JpaRepository<SubscriptionCacheEntry, Long> {
+
+    List<SubscriptionCacheEntry> getAllByNameStartsWith(String s);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionProviderConfigRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionProviderConfigRepository.java
new file mode 100644
index 0000000..b93cc06
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/SubscriptionProviderConfigRepository.java
@@ -0,0 +1,8 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.SubscriptionProviderConfig;
+
+public interface SubscriptionProviderConfigRepository extends JpaRepository<SubscriptionProviderConfig, Long> {
+
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/repository/UserRepository.java b/src/main/java/ru/kirillius/pf/sdn/repository/UserRepository.java
new file mode 100644
index 0000000..cd136a7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/repository/UserRepository.java
@@ -0,0 +1,13 @@
+package ru.kirillius.pf.sdn.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.kirillius.pf.sdn.entity.User;
+
+import java.util.Optional;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    Optional<User> findByUsername(String username);
+
+    boolean existsByUsername(String username);
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/AuthService.java b/src/main/java/ru/kirillius/pf/sdn/service/AuthService.java
new file mode 100644
index 0000000..7d3b456
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/AuthService.java
@@ -0,0 +1,115 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import ru.kirillius.pf.sdn.config.JwtService;
+import ru.kirillius.pf.sdn.entity.ApiToken;
+import ru.kirillius.pf.sdn.entity.User;
+import ru.kirillius.pf.sdn.repository.ApiTokenRepository;
+import ru.kirillius.pf.sdn.repository.UserRepository;
+
+import java.security.SecureRandom;
+import java.util.HexFormat;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+@RequiredArgsConstructor
+public class AuthService {
+
+    private final UserRepository userRepository;
+    private final ApiTokenRepository apiTokenRepository;
+    private final PasswordEncoder passwordEncoder;
+    private final JwtService jwtService;
+
+    private static final int API_TOKEN_BYTES = 32;
+
+    @Transactional
+    public void createDefaultUserIfAbsent() {
+        if (!userRepository.existsByUsername("admin")) {
+            User user = new User();
+            user.setUsername("admin");
+            user.setPasswordHash(passwordEncoder.encode("admin"));
+            userRepository.save(user);
+        }
+    }
+
+    public Optional<String> login(String username, String rawPassword) {
+        return userRepository.findByUsername(username)
+                .filter(User::isEnabled)
+                .filter(user -> passwordEncoder.matches(rawPassword, user.getPasswordHash()))
+                .map(user -> jwtService.generateToken(user.getId()));
+    }
+
+    @Transactional
+    public boolean changePassword(Long userId, String oldPassword, String newPassword) {
+        return userRepository.findById(userId)
+                .filter(user -> passwordEncoder.matches(oldPassword, user.getPasswordHash()))
+                .map(user -> {
+                    user.setPasswordHash(passwordEncoder.encode(newPassword));
+                    userRepository.save(user);
+                    return true;
+                })
+                .orElse(false);
+    }
+
+    public Optional<Long> validateToken(String token) {
+        return jwtService.validateToken(token);
+    }
+
+    public void invalidateToken(String token) {
+        // JWT is stateless — client just discards the token
+    }
+
+    @Transactional
+    public String generateApiToken(Long userId, String name) {
+        SecureRandom random = new SecureRandom();
+        byte[] bytes = new byte[API_TOKEN_BYTES];
+        random.nextBytes(bytes);
+        String rawToken = HexFormat.of().formatHex(bytes);
+
+        ApiToken apiToken = new ApiToken();
+        apiToken.setName(name);
+        apiToken.setTokenHash(passwordEncoder.encode(rawToken));
+        apiToken.setUserId(userId);
+        apiTokenRepository.save(apiToken);
+
+        return apiToken.getId() + "." + rawToken;
+    }
+
+    public Optional<Long> validateApiToken(String rawToken) {
+        for (ApiToken stored : apiTokenRepository.findByEnabledTrue()) {
+            if (passwordEncoder.matches(rawToken, stored.getTokenHash())) {
+                updateLastUsedAt(stored);
+                return Optional.of(stored.getUserId());
+            }
+        }
+        return Optional.empty();
+    }
+
+    public Optional<Long> resolveUserId(String token) {
+        return validateToken(token)
+                .or(() -> validateApiToken(token));
+    }
+
+    @Transactional
+    public boolean deleteApiToken(Long tokenId, Long userId) {
+        return apiTokenRepository.findByIdAndUserId(tokenId, userId)
+                .map(token -> {
+                    apiTokenRepository.delete(token);
+                    return true;
+                })
+                .orElse(false);
+    }
+
+    public List<ApiToken> getUserApiTokens(Long userId) {
+        return apiTokenRepository.findByUserId(userId);
+    }
+
+    private void updateLastUsedAt(ApiToken token) {
+        token.setLastUsedAt(java.time.LocalDateTime.now());
+        apiTokenRepository.save(token);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemCacheService.java b/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemCacheService.java
new file mode 100644
index 0000000..600365d
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemCacheService.java
@@ -0,0 +1,37 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import org.springframework.stereotype.Service;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+import ru.kirillius.pf.sdn.entity.AutonomousSystemCacheEntry;
+import ru.kirillius.pf.sdn.repository.AutonomousSystemCacheRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+@Setter
+@RequiredArgsConstructor
+@Service
+public class AutonomousSystemCacheService {
+    private final AutonomousSystemCacheRepository repository;
+
+    public void store(int number, List<IPv4Subnet> subnets) {
+        synchronized (repository) {
+            if (repository.existsByNumber(number)) {
+                repository.findByNumber(number).ifPresent(entry -> {
+                    entry.setPrefixes(subnets);
+                    repository.save(entry);
+                });
+            } else {
+                repository.save(AutonomousSystemCacheEntry.builder().number(number).prefixes(subnets).build());
+            }
+        }
+    }
+
+    public Optional<AutonomousSystemCacheEntry> load(int number) {
+        synchronized (repository) {
+            return repository.findByNumber(number);
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemResolverService.java b/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemResolverService.java
new file mode 100644
index 0000000..3862ab1
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/AutonomousSystemResolverService.java
@@ -0,0 +1,83 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import ru.kirillius.pf.sdn.api.Networking.AutonomousSystemResolver;
+import ru.kirillius.pf.sdn.api.Networking.AutonomousSystemResolverApi;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+import ru.kirillius.pf.sdn.api.dto.IPQueryInfo;
+
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicReference;
+
+@Setter
+@RequiredArgsConstructor
+public class AutonomousSystemResolverService implements AutonomousSystemResolver {
+    private final ExecutorService executor;
+    private final List<AutonomousSystemResolverApi> apis = new CopyOnWriteArrayList<>();
+    private final AtomicReference<AutonomousSystemResolverApi> currentApi = new AtomicReference<>();
+
+    private synchronized void selectNextApi() {
+        if (apis.isEmpty()) {
+            return;
+        }
+        var index = apis.indexOf(currentApi.get());
+        if (index == -1 || index == apis.size() - 1) {
+            currentApi.set(apis.getFirst());
+            return;
+        }
+        currentApi.set(apis.get(index + 1));
+    }
+
+    @Override
+    public void registerApi(AutonomousSystemResolverApi api) {
+        apis.add(api);
+        if (currentApi.get() == null) {
+            currentApi.set(api);
+        }
+    }
+
+    @Override
+    public Future<List<IPv4Subnet>> getPrefixes(int as) {
+        return executor.submit(() -> {
+            checkApis();
+            return executeWithFallbackSelection(() -> currentApi.get().getPrefixes(as));
+        });
+    }
+
+    private void checkApis() throws IOException {
+        if (apis.isEmpty()) {
+            throw new IOException("You're trying to resolve an AS without any resolvers");
+        }
+        if (currentApi.get() == null) {
+            selectNextApi();
+        }
+    }
+
+    private <T> T executeWithFallbackSelection(Callable<T> callable) throws IOException {
+        var retries = 0;
+        while (retries < apis.size()) {
+            try {
+                return callable.call();
+            } catch (Exception e) {
+                retries++;
+                selectNextApi();
+            }
+        }
+        throw new IOException("Unable to perform operation on every AS resolver");
+    }
+
+    @Override
+    public Future<IPQueryInfo> getAddressInfo(Inet4Address address) {
+        return executor.submit(() -> {
+            checkApis();
+            return executeWithFallbackSelection(() -> currentApi.get().queryAddress(address));
+        });
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/DomainCacheService.java b/src/main/java/ru/kirillius/pf/sdn/service/DomainCacheService.java
new file mode 100644
index 0000000..70dacd7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/DomainCacheService.java
@@ -0,0 +1,63 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import org.springframework.stereotype.Service;
+import ru.kirillius.pf.sdn.entity.DomainCacheEntry;
+import ru.kirillius.pf.sdn.repository.DomainCacheRepository;
+
+import java.net.Inet4Address;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.List;
+
+@Setter
+@RequiredArgsConstructor
+@Service
+public class DomainCacheService {
+    private final DomainCacheRepository repository;
+    private static final int DOMAIN_TTL_HOURS = 12;
+
+    public void update(String domain, List<Inet4Address> addresses) {
+        var minDate = Instant.now().minus(Duration.ofHours(DOMAIN_TTL_HOURS));
+        synchronized (repository) {
+            var existing = repository.getAllByDomain(domain);
+            var existingAddresses = existing.stream().map(DomainCacheEntry::getAddress).toList();
+            existing.forEach(entry -> {
+                if (addresses.contains(entry.getAddress())) {
+                    entry.setLastUpdate(Instant.now());
+                    entry.setLastSeen(Instant.now());
+                } else {
+                    if (entry.getLastSeen().isBefore(minDate)) {
+                        repository.delete(entry);
+                    } else {
+                        entry.setLastUpdate(Instant.now());
+                    }
+                }
+            });
+
+            addresses.stream()
+                    .filter(address -> !existingAddresses.contains(address))
+                    .forEach(address -> repository.save(
+                                    DomainCacheEntry.builder()
+                                            .domain(domain)
+                                            .address(address)
+                                            .lastUpdate(Instant.now())
+                                            .lastSeen(Instant.now())
+                                            .build()
+                            )
+                    );
+        }
+    }
+
+    public List<Inet4Address> load(String domain, boolean filterOutdated) {
+        var minDate = Instant.now().minus(Duration.ofHours(DOMAIN_TTL_HOURS));
+        synchronized (repository) {
+            var found = repository.getAllByDomain(domain);
+            if (filterOutdated && !found.isEmpty()) {
+                found = found.stream().filter(entry -> entry.getLastSeen().isAfter(minDate)).toList();
+            }
+            return found.stream().map(DomainCacheEntry::getAddress).toList();
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/DomainResolverService.java b/src/main/java/ru/kirillius/pf/sdn/service/DomainResolverService.java
new file mode 100644
index 0000000..8862361
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/DomainResolverService.java
@@ -0,0 +1,139 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.kirillius.pf.sdn.Util.IPv4Util;
+import ru.kirillius.pf.sdn.api.Networking.DomainResolver;
+import ru.kirillius.pf.sdn.config.BeanConfiguration;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.Inet4Address;
+import java.net.UnknownHostException;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+@Service
+@RequiredArgsConstructor
+public class DomainResolverService implements DomainResolver {
+    private final static int SUCCESS_CODE = 0;
+    private final BeanConfiguration config;
+    private final ExecutorService executor;
+    private final RuntimeConfigService configService;
+
+    /**
+     * Returns a list of IPv4 addresses resolved for the provided domain.
+     */
+    private static List<Inet4Address> lookup(String domain, Inet4Address server) throws IOException, InterruptedException {
+        if (domain == null || domain.isBlank()) {
+            throw new IllegalArgumentException("Domain must not be null or blank");
+        }
+
+        var processBuilder = new ProcessBuilder("nslookup", domain.trim(), server.getHostAddress().trim());
+        processBuilder.redirectErrorStream(true);
+
+        var process = processBuilder.start();
+        try {
+            if (!process.waitFor(10, TimeUnit.SECONDS)) {
+                process.destroyForcibly();
+                throw new InterruptedException("Request timed out for domain: " + domain);
+            }
+
+            var output = readStream(process.getInputStream());
+            if (process.exitValue() != SUCCESS_CODE) {
+                throw new IOException("nslookup failed for domain " + domain + ": " + output);
+            }
+            return extractIPv4(output);
+        } finally {
+            process.destroy();
+        }
+
+    }
+
+    private static List<Inet4Address> extractIPv4(String output) {
+        var addresses = new LinkedHashSet<Inet4Address>();
+        var allowAddresses = false;
+
+        for (var rawLine : output.split("\\R")) {
+            var line = rawLine.trim();
+            if (line.isEmpty()) {
+                allowAddresses = false;
+                continue;
+            }
+
+            if (line.startsWith("Name:")) {
+                allowAddresses = true;
+                continue;
+            }
+
+            if (!allowAddresses) {
+                continue;
+            }
+
+            if (line.startsWith("Address:") || line.startsWith("Addresses:")) {
+                var colonIndex = line.indexOf(':');
+                if (colonIndex == -1 || colonIndex == line.length() - 1) {
+                    continue;
+                }
+
+                var tokens = line.substring(colonIndex + 1).trim().split("\\s+");
+                for (var token : tokens) {
+                    try {
+                        IPv4Util.validateAddress(token);
+                        addresses.add((Inet4Address) Inet4Address.getByName(token));
+                    } catch (IllegalArgumentException ignored) {
+                        // skip invalid addresses such as IPv6
+                    } catch (UnknownHostException e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+            }
+        }
+
+        return new ArrayList<>(addresses);
+    }
+
+    private static String readStream(InputStream stream) throws IOException {
+        try (stream) {
+            return new String(stream.readAllBytes(), StandardCharsets.UTF_8);
+        }
+    }
+
+    @Override
+    public Future<List<Inet4Address>> getAddresses(String domain, Inet4Address server) {
+        return getAddresses(domain, Collections.singletonList(server));
+    }
+
+    @Override
+    public Future<List<Inet4Address>> getAddresses(String domain) {
+        return getAddresses(domain, configService.getConfig().getDomainResolvers());
+    }
+
+    @Override
+    public Future<List<Inet4Address>> getAddresses(String domain, List<Inet4Address> servers) {
+        return executor.submit(() -> {
+            var resolvers = configService.getConfig().getDomainResolvers();
+
+            if (resolvers.isEmpty()) {
+                throw new UnknownHostException("You're trying to resolve a domain without any resolvers");
+            }
+
+            for (var server : resolvers) {
+                try {
+                    return lookup(domain, server);
+                } catch (IOException e) {
+                    throw new UnknownHostException("Failed to resolve domain: " + domain);
+                } catch (InterruptedException e) {
+                    continue; //network error
+                }
+            }
+            throw new UnknownHostException("Failed to resolve domain " + domain + " due to network error or something nasty");
+        });
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/DomainUpdaterService.java b/src/main/java/ru/kirillius/pf/sdn/service/DomainUpdaterService.java
new file mode 100644
index 0000000..d78fa5a
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/DomainUpdaterService.java
@@ -0,0 +1,89 @@
+package ru.kirillius.pf.sdn.service;
+
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import ru.kirillius.pf.sdn.Util.WorkerUtils;
+import ru.kirillius.pf.sdn.api.Networking.DomainResolver;
+
+import java.net.Inet4Address;
+import java.time.Duration;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class DomainUpdaterService {
+    private final DomainCacheService domainCacheService;
+    private final DomainResolver domainResolver;
+    private final ExecutorService executor;
+    private final SubscriptionService subscriptionService;
+
+    public List<Inet4Address> getActualAddresses(String domain) {
+        var cached = domainCacheService.load(domain, true);
+        if (!cached.isEmpty()) {
+            var resolved = domainResolver.getAddresses(domain);
+            while (!resolved.isDone() && !resolved.isCancelled()) {
+                Thread.yield();
+            }
+            if (resolved.isDone()) {
+                try {
+                    domainCacheService.update(domain, resolved.get());
+                    cached.addAll(resolved.get());
+                } catch (InterruptedException | ExecutionException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+        return cached;
+    }
+
+    private Future<?> worker;
+    private final RuntimeConfigService configService;
+
+    @PostConstruct
+    private void initialize() {
+        worker = executor.submit(() -> new WorkerUtils.LoopedWorker() {
+            @Override
+            protected void doWork() {
+                subscriptionService.getSubscriptions().forEach(subscription -> {
+                    var scope = subscription.getScope();
+                    if (!scope.isResolveDomains()) {
+                        return;
+                    }
+                    scope.getDomains().forEach(domain -> {
+                        var future = domainResolver.getAddresses(domain);
+                        while (!future.isDone() && !future.isCancelled()) {
+                            Thread.yield();
+                        }
+
+                        if (future.isDone()) {
+                            try {
+                                domainCacheService.update(domain, future.get());
+                            } catch (InterruptedException | ExecutionException e) {
+                                log.error("Domain {} resolve failed", domain);
+                            }
+                        }
+                    });
+                });
+
+                WorkerUtils.waitForTimer(() -> Duration.ofMinutes(configService.getConfig().getDomainResolveInterval()));
+
+            }
+        });
+
+    }
+
+    @PreDestroy
+    private void destroy() {
+        if (worker != null) {
+            worker.cancel(true);
+            worker = null;
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/NetworkingService.java.txt b/src/main/java/ru/kirillius/pf/sdn/service/NetworkingService.java.txt
new file mode 100644
index 0000000..2a0561b
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/NetworkingService.java.txt
@@ -0,0 +1,341 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.Getter;
+import org.json.JSONObject;
+import org.json.JSONTokener;
+import org.springframework.stereotype.Service;
+import ru.kirillius.java.utils.events.EventListener;
+import ru.kirillius.json.JSONUtility;
+import ru.kirillius.pf.sdn.api.Networking.IPv4Subnet;
+import ru.kirillius.pf.sdn.api.Networking.NetworkScope;
+import ru.kirillius.pf.sdn.dto.ResolverCacheEntry;
+import ru.kirillius.pf.sdn.core.AppService;
+import ru.kirillius.pf.sdn.core.Context;
+import ru.kirillius.pf.sdn.core.ContextEventsHandler;
+import ru.kirillius.pf.sdn.core.Subscription.SubscriptionService;
+import ru.kirillius.pf.sdn.core.Util.IPv4Util;
+import ru.kirillius.utils.logging.SystemLogger;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Builds the effective set of network resources by combining subscriptions, caches, and filters.
+ */
+@Service
+
+public class NetworkingService extends AppService {
+    private final static String CTX = NetworkingService.class.getSimpleName();
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private final File domainCacheFile;
+    private final File asCacheFile;
+    private final EventListener<NetworkResourceConfig> resourceUpdateSubscription;
+    private final EventListener<ContextEventsHandler.ConfigChangeContext> configChangeSubscription;
+    private final AtomicReference<Future<?>> updateProcess = new AtomicReference<>();
+    @Getter
+    private final NetworkResourceConfig inputResources = new NetworkResourceConfig();
+    @Getter
+    private final NetworkResourceConfig outputResources = new NetworkResourceConfig();
+
+    private final Map<Integer, List<IPv4Subnet>> prefixCache = new ConcurrentHashMap<>();
+    private final Map<String, ResolverCacheEntry> domainCache = new ConcurrentHashMap<>();
+
+    /**
+     * Creates the networking service, wiring subscriptions and restoring cached state.
+     */
+    public NetworkingService(Context context) {
+        super(context);
+        inputResources.clear();
+        inputResources.add(context.getConfig().getCustomResources());
+        resourceUpdateSubscription = context.getEventsHandler().getSubscriptionsUpdateEvent().add(bundle -> rebuildInputs());
+        configChangeSubscription = context.getEventsHandler().getConfigChangeEvent().add(changeContext -> {
+            var filtersChanges = !changeContext.getCurrent().getFilteredResources().equals(changeContext.getInitial().getFilteredResources());
+            var resChanges = !changeContext.getCurrent().getCustomResources().equals(changeContext.getInitial().getCustomResources());
+            if (resChanges || filtersChanges) {
+                NetworkingService.this.rebuildInputs();
+            }
+        });
+        domainCacheFile = new File(context.getConfig().getCacheDirectory(), "domain-cache.json");
+        asCacheFile = new File(context.getConfig().getCacheDirectory(), "as-cache.json");
+        if (asCacheFile.exists() && context.getConfig().isCachingAS()) {
+            SystemLogger.message("Loading as cache file", CTX);
+            try (var is = new FileInputStream(asCacheFile)) {
+                var json = new JSONObject(new JSONTokener(is));
+                json.keySet().forEach(key -> {
+                    var as = Integer.parseInt(key);
+                    prefixCache.put(as, JSONUtility.deserializeCollection(json.getJSONArray(key), IPv4Subnet.class, null).toList());
+                });
+            } catch (Exception e) {
+                SystemLogger.error("Failed to load as cache file " + asCacheFile.getPath(), CTX, e);
+            }
+        }
+
+        if (domainCacheFile.exists() && context.getConfig().isCachingAS()) {
+            SystemLogger.message("Loading domain cache file", CTX);
+            try (var is = new FileInputStream(domainCacheFile)) {
+                var json = new JSONObject(new JSONTokener(is));
+                json.keySet().forEach(host -> {
+                    domainCache.put(host, JSONUtility.deserializeStructure(json.getJSONObject(host), ResolverCacheEntry.class));
+                });
+            } catch (Exception e) {
+                SystemLogger.error("Failed to load domain cache file " + asCacheFile.getPath(), CTX, e);
+            }
+        }
+
+
+    }
+
+    public void performAutoresolve() {
+        var current = new HashSet<IPv4Subnet>();
+        domainCache.forEach((host, entry) -> current.addAll(entry.getAddresses().keySet()));
+
+        resolveDomains(List.copyOf(context.getServiceManager().getService(SubscriptionService.class).getAutoResolvingDomains()));
+
+        var resolved = new HashSet<IPv4Subnet>();
+        domainCache.forEach((host, entry) -> resolved.addAll(entry.getAddresses().keySet()));
+
+        if (resolved.size() != current.size()) {
+            rebuildInputs();
+        } else {
+            var updated = false;
+            for (var subnet : resolved) {
+                if (!current.contains(subnet)) {
+                    updated = true;
+                    break;
+                }
+            }
+            if (updated) {
+                rebuildInputs();
+            }
+        }
+
+        if(!context.getConfig().isCachingDomains()){
+            domainCache.clear();
+        }
+    }
+
+    private void rebuildInputs() {
+        inputResources.clear();
+        inputResources.add(context.getConfig().getCustomResources());
+        inputResources.add(context.getServiceManager().getService(SubscriptionService.class).getOutputResources());
+        triggerUpdate(false);
+    }
+
+    /**
+     * Indicates whether an update job is currently executing.
+     */
+    public boolean isUpdatingNow() {
+        var future = updateProcess.get();
+        return future != null && !future.isDone() && !future.isCancelled();
+    }
+
+    /**
+     * Schedules an update of network resources, optionally ignoring cached prefixes.
+     */
+    public void triggerUpdate(boolean ignoreCache) {
+        if (isUpdatingNow()) {
+            return;
+        }
+        SystemLogger.message("Updating network manager", CTX);
+
+        updateProcess.set(executor.submit(() -> {
+            try {
+                SystemLogger.message("Update is started", CTX);
+                var config = context.getConfig();
+                var filteredResources = config.getFilteredResources();
+
+                var domains = new HashSet<>(inputResources.getDomains());
+                filteredResources.getDomains().forEach(domains::remove);
+                //check domain overlaps
+
+                var domainsToRemove = new HashSet<String>();
+                for (var domainToMatch : domains) {
+                    var pattern = "." + domainToMatch;
+                    for (var domain : domains) {
+                        if (domain.endsWith(pattern)) {
+                            domainsToRemove.add(domain);
+                        }
+                    }
+                }
+
+                domains.removeAll(domainsToRemove);
+
+                var asn = new ArrayList<>(inputResources.getASN());
+                asn.removeAll(filteredResources.getASN());
+
+                var asnToFetch = new ArrayList<>(asn);
+                if (!ignoreCache) {
+                    asnToFetch.removeAll(prefixCache.keySet());
+                }
+
+                fetchPrefixes(asnToFetch);
+
+                if (config.isCachingAS()) {
+                    try (var os = new FileOutputStream(asCacheFile)) {
+                        var json = new JSONObject();
+                        prefixCache.forEach((key, asnList) -> {
+                            json.put(String.valueOf(key), JSONUtility.serializeCollection(asnList, IPv4Subnet.class, null));
+                        });
+                        os.write(json.toString().getBytes());
+                    } catch (IOException e) {
+                        SystemLogger.error("Unable to write file " + asCacheFile.getPath(), CTX, e);
+                    }
+                }
+
+                resolveDomains(List.copyOf(context.getServiceManager().getService(SubscriptionService.class).getAutoResolvingDomains()));
+
+                if (config.isCachingDomains()) {
+                    try (var os = new FileOutputStream(domainCacheFile)) {
+                        var json = new JSONObject();
+                        domainCache.forEach((key, entry) -> {
+                            var serialized = JSONUtility.serializeStructure(entry);
+                            json.put(String.valueOf(key), serialized);
+                        });
+                        os.write(json.toString().getBytes());
+                    } catch (IOException e) {
+                        SystemLogger.error("Unable to write file " + domainCacheFile.getPath(), CTX, e);
+                    }
+                }
+
+                var subnets = new HashSet<>(inputResources.getSubnets());
+                asn.forEach(n -> {
+                    var cached = prefixCache.get(n);
+                    if (cached == null) {
+                        return;
+                    }
+                    subnets.addAll(cached);
+                    SystemLogger.message("Using " + cached.size() + " subnets from AS" + n, CTX);
+                });
+
+                //добавляем отрезолвенные домены
+                domains.forEach(domain -> {
+                    var entry = domainCache.get(domain);
+                    if (entry != null) {
+                        subnets.addAll(entry.getAddresses().keySet());
+                    }
+                });
+
+                filteredResources.getSubnets().forEach(subnets::remove);
+
+                SystemLogger.message("Trying to summary " + subnets.size() + " subnets...", CTX);
+
+                var merged = IPv4Util.summarySubnets(subnets, config.getMergeSubnetsWithUsage());
+                var unmerged = new AtomicInteger();
+                subnets.forEach(subnet -> {
+                    if (!merged.getMergedSubnets().contains(subnet)) {
+                        unmerged.getAndIncrement();
+                    }
+                });
+
+                SystemLogger.message(subnets.size() + " subnets has been summarized and merged to " + merged.getResult().size() + " new subnets. Unmerged: " + unmerged.get(), CTX);
+
+                outputResources.setASN(Collections.unmodifiableList(asn));
+                outputResources.setSubnets(merged.getResult());
+                outputResources.setDomains(domains.stream().toList());
+
+                SystemLogger.message("Update is complete", CTX);
+
+                try {
+                    context.getEventsHandler().getNetworkManagerUpdateEvent().invoke(outputResources);
+                } catch (Exception e) {
+                    SystemLogger.error("Unable to invoke update event", CTX, e);
+                }
+            } catch (Exception e) {
+                SystemLogger.error("Something went wrong on update", CTX, e);
+            }
+        }));
+    }
+
+    private void resolveDomains(List<String> domains) {
+        var resolvedSubnets = new ArrayList<IPv4Subnet>();
+        var resolver = context.getServiceManager().getService(DomainResolverService.class);
+        for (var domain : domains) {
+            var task = resolver.resolve(domain);
+            while (!task.isDone() && !task.isCancelled()) {
+                Thread.yield();
+            }
+            try {
+                var subnets = task.get();
+                var entry = domainCache.get(domain);
+
+                if(entry == null) {
+                    entry = new ResolverCacheEntry();
+                    domainCache.put(domain, entry);
+                }
+
+                var addresses = entry.getAddresses();
+                entry.setLastUpdate(Instant.now());
+                subnets.forEach(subnet -> addresses.put(subnet, Instant.now()));
+                resolvedSubnets.addAll(domainCache.get(domain).getAddresses().keySet());
+            } catch (InterruptedException | ExecutionException e) {
+                SystemLogger.error("Error happened while resolving domain " + domain, CTX, e);
+            }
+        }
+
+        //remove old entries
+        for (var domain : domainCache.keySet()) {
+            var entry = domainCache.get(domain);
+            var addresses = entry.getAddresses();
+            for (var subnet : addresses.keySet()) {
+                var time = addresses.get(subnet);
+                if (time.isBefore(Instant.now().minus(context.getConfig().getDomainsTimeToLive(), ChronoUnit.HOURS))) {
+                    addresses.remove(subnet);
+                }
+            }
+            if (addresses.isEmpty()) {
+                domainCache.remove(domain);
+            }
+        }
+    }
+
+    /**
+     * Fetches prefixes for the given autonomous systems and stores them in the cache.
+     */
+    private void fetchPrefixes(List<Integer> systems) {
+        var service = context.getServiceManager().getService(BGPInfoService.class);
+        systems.forEach(as -> {
+            var currentProvider = service.getProvider();
+            var done = false;
+            do {
+                SystemLogger.message("Fetching AS" + as + " prefixes...", CTX);
+                var future = service.getPrefixes(as);
+
+                while (!future.isDone() && !future.isCancelled()) {
+                    Thread.yield();
+                }
+
+                try {
+                    var iPv4Subnets = future.get();
+                    prefixCache.put(as, iPv4Subnets);
+                    done = true;
+                    break;
+                } catch (InterruptedException | ExecutionException e) {
+                    service.fallbackNextProvider();
+                    SystemLogger.error("Error happened while fetching AS" + as + " prefixes. Trying to use fallback BGP info provider:" + service.getProvider().getClass().getSimpleName(), CTX, e);
+                }
+            } while (service.getProvider() != currentProvider);
+            if (!done) {
+                SystemLogger.error("Unable to fetch AS" + as + " prefixes from all providers. Trying to use cache...", CTX);
+            }
+        });
+    }
+
+    /**
+     * Removes event subscriptions and shuts down the executor.
+     */
+    @Override
+    public void close() throws IOException {
+        context.getEventsHandler().getSubscriptionsUpdateEvent().remove(resourceUpdateSubscription);
+        context.getEventsHandler().getConfigChangeEvent().remove(configChangeSubscription);
+
+        executor.shutdown();
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/PipelineExecutorService.java b/src/main/java/ru/kirillius/pf/sdn/service/PipelineExecutorService.java
new file mode 100644
index 0000000..eff6339
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/PipelineExecutorService.java
@@ -0,0 +1,61 @@
+package ru.kirillius.pf.sdn.service;
+
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import org.springframework.stereotype.Service;
+import ru.kirillius.pf.sdn.api.pipeline.ProcessingPipeline;
+
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+
+@Service
+@RequiredArgsConstructor
+public class PipelineExecutorService {
+    private final ExecutorService executor;
+    private final Queue<ProcessingPipeline> executionQueue = new ConcurrentLinkedQueue<>();
+
+    public void triggerExecute(ProcessingPipeline pipeline) {
+        if (executionQueue.contains(pipeline)) {
+            return;
+        }
+        executionQueue.add(pipeline);
+    }
+
+    @PostConstruct
+    private void initialize() {
+        worker = executor.submit(new PipelineWorker());
+    }
+
+    @PreDestroy
+    private void destroy() {
+        if (worker != null) {
+            worker.cancel(true);
+        }
+    }
+
+    private Future<?> worker;
+
+    private class PipelineWorker implements Runnable {
+        @SuppressWarnings("BusyWait")
+        @SneakyThrows
+        @Override
+        public void run() {
+            while (!Thread.currentThread().isInterrupted()) {
+                while (!executionQueue.isEmpty()) {
+                    var pipeline = executionQueue.poll();
+                    try {
+                        pipeline.execute();
+                    } catch (Exception e) {
+                        //TODO write log
+                    }
+                }
+                Thread.sleep(100L);
+                Thread.yield();
+            }
+        }
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/RuntimeConfigService.java b/src/main/java/ru/kirillius/pf/sdn/service/RuntimeConfigService.java
new file mode 100644
index 0000000..da7e9eb
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/RuntimeConfigService.java
@@ -0,0 +1,23 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.stereotype.Service;
+
+import java.net.Inet4Address;
+import java.util.List;
+
+@Service
+public class RuntimeConfigService {
+    @Getter
+    @Setter
+    public class Config {
+        private int domainResolveInterval = 1;
+        private int subscriptionUpdateInterval = 1;
+
+        private List<Inet4Address> domainResolvers;
+    }
+
+    @Getter
+    private final Config config = new Config();
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/SessionService.java b/src/main/java/ru/kirillius/pf/sdn/service/SessionService.java
new file mode 100644
index 0000000..a063f02
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/SessionService.java
@@ -0,0 +1,30 @@
+package ru.kirillius.pf.sdn.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+
+import java.util.Optional;
+
+@Service
+@RequiredArgsConstructor
+public class SessionService {
+
+    private final AuthService authService;
+
+    public Optional<Long> resolveUserId(String authHeader) {
+        return extractToken(authHeader)
+                .flatMap(authService::resolveUserId);
+    }
+
+    public Optional<String> extractToken(String authHeader) {
+        if (StringUtils.hasText(authHeader) && authHeader.startsWith("Bearer ")) {
+            return Optional.of(authHeader.substring(7));
+        }
+        return Optional.empty();
+    }
+
+    public void invalidate(String token) {
+        authService.invalidateToken(token);
+    }
+}
diff --git a/src/main/java/ru/kirillius/pf/sdn/service/SubscriptionService.java b/src/main/java/ru/kirillius/pf/sdn/service/SubscriptionService.java
new file mode 100644
index 0000000..67871d7
--- /dev/null
+++ b/src/main/java/ru/kirillius/pf/sdn/service/SubscriptionService.java
@@ -0,0 +1,149 @@
+package ru.kirillius.pf.sdn.service;
+
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.ApplicationContext;
+import org.springframework.stereotype.Service;
+import ru.kirillius.java.utils.events.ConcurrentEventHandler;
+import ru.kirillius.java.utils.events.EventHandler;
+import ru.kirillius.pf.sdn.Util.WorkerUtils;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.CacheFallbackProviderProtocol;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.Subscription;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.SubscriptionProvider;
+import ru.kirillius.pf.sdn.api.Networking.Subscriptions.SubscriptionProviderProtocol;
+import ru.kirillius.pf.sdn.repository.SubscriptionProviderConfigRepository;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class SubscriptionService {
+
+    private final SubscriptionProviderConfigRepository configRepository;
+    private final ExecutorService executorService;
+    private final RuntimeConfigService runtimeConfigService;
+    private final Map<String, SubscriptionProviderProtocol> protocols = new ConcurrentHashMap<>();
+    private final Map<String, SubscriptionProvider> providers = new ConcurrentHashMap<>();
+    private final AtomicInteger updateCounter = new AtomicInteger(0);
+    private final List<Subscription> subscriptions = new CopyOnWriteArrayList<>();
+    private Future<?> worker;
+
+
+
+    public List<Subscription> getSubscriptions() {
+        return Collections.unmodifiableList(subscriptions);
+    }
+
+    public void update() {
+        updateCounter.incrementAndGet();
+    }
+
+    @PreDestroy
+    private void destroy() {
+        if (worker != null) {
+            worker.cancel(true);
+            worker = null;
+        }
+    }
+
+    private final ApplicationContext context;
+
+    public void reloadProviders() {
+        var beanFactory = context.getAutowireCapableBeanFactory();
+        synchronized (providers) {
+            providers.clear();
+            configRepository.findAll().forEach(config -> {
+                var protocol = protocols.get(config.getProtocolId());
+                if (protocol == null) {
+                    log.error("Provider protocol with id {} not found. Using fallback from cache.", config.getProtocolId());
+                    protocol = beanFactory.createBean(CacheFallbackProviderProtocol.class);
+                }
+                providers.put(config.getName(), SubscriptionProvider.builder()
+                        .config(config)
+                        .protocol(protocol)
+                        .build()
+                );
+            });
+        }
+    }
+
+    @Getter
+    private final EventHandler<Subscription> updateEvent = new ConcurrentEventHandler<>();
+
+    private void reloadSubscriptions() {
+        var retrieved = new ArrayList<Subscription>();
+        var updated = new ArrayList<Subscription>();
+
+        providers.values().forEach(provider -> {
+            updated.addAll(provider.update());
+            retrieved.addAll(provider.getSubscriptions());
+        });
+
+        synchronized (subscriptions) {
+            subscriptions.clear();
+            subscriptions.addAll(retrieved);
+        }
+
+        updated.forEach(s -> {
+            try {
+                updateEvent.invoke(s);
+            } catch (Exception e) {
+                log.error("Failed to invoke subscription update event because of error {}:{}", e.getClass().getSimpleName(), e.getMessage());
+            }
+        });
+    }
+
+    @PostConstruct
+    private void initialize() {
+        reloadProviders();
+        reloadSubscriptions();
+
+        worker = executorService.submit(new WorkerUtils.LoopedWorker() {
+            private Instant lastUpdate = Instant.now();
+
+            @Override
+            protected void doWork() {
+                if (updateCounter.get() > 0) {
+                    updateCounter.set(0);
+                }
+                reloadSubscriptions();
+                lastUpdate = Instant.now();
+                var config = runtimeConfigService.getConfig();
+
+                WorkerUtils.waitForCondition(() -> Duration.between(lastUpdate, Instant.now())
+                        .compareTo(Duration.ofMinutes(config.getSubscriptionUpdateInterval())) > 0
+                        || updateCounter.get() > 0, 1000L);
+            }
+        });
+
+    }
+
+    public void registerProvider(SubscriptionProviderProtocol subscriptionProviderProtocol) {
+        if (subscriptionProviderProtocol == null) {
+            throw new IllegalArgumentException();
+        }
+        var identifier = subscriptionProviderProtocol.getIdentifier();
+        if (identifier == null || identifier.isBlank()) {
+            throw new IllegalArgumentException("Identifier is null or blank");
+        }
+        if (protocols.containsKey(identifier)) {
+            return;
+        }
+        protocols.put(identifier, subscriptionProviderProtocol);
+    }
+
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..4e462de
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1 @@
+jwt.secret=very-strong1234568ds7f7df6g7fd5df67g5ds78g6ds75gdf678g78g623r432r3213few
\ No newline at end of file
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
new file mode 100644
index 0000000..b7514f6
--- /dev/null
+++ b/src/main/resources/application.yml
@@ -0,0 +1,24 @@
+spring:
+  application:
+    name: pf-sdn
+
+  datasource:
+    url: ${app.datasource.url}
+    driver-class-name: org.h2.Driver
+    username: sa
+    password:
+
+  h2:
+    console:
+      enabled: true
+      path: /h2-console
+
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        dialect: org.hibernate.dialect.H2Dialect
+
+
diff --git a/src/main/resources/static/index.html b/src/main/resources/static/index.html
new file mode 100644
index 0000000..9e2c6a2
--- /dev/null
+++ b/src/main/resources/static/index.html
@@ -0,0 +1,121 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>pf-sdn Auth Test</title>
+    <style>
+        body { font-family: sans-serif; padding: 2rem; background: #f5f5f5; }
+        .card { background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,.15); margin-bottom: 1.5rem; }
+        h2 { margin-top: 0; }
+        label { display: block; margin-bottom: .25rem; font-weight: 600; }
+        input { width: 100%; padding: .5rem; margin-bottom: 1rem; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; }
+        button { padding: .5rem 1.5rem; border: none; border-radius: 4px; cursor: pointer; font-size: 1rem; }
+        .btn-primary { background: #007bff; color: #fff; }
+        .btn-danger { background: #dc3545; color: #fff; }
+        .btn-success { background: #28a745; color: #fff; }
+        pre { background: #f0f0f0; padding: 1rem; border-radius: 4px; overflow-x: auto; }
+        .hidden { display: none; }
+    </style>
+</head>
+<body>
+    <h1>pf-sdn Auth Test</h1>
+
+    <div class="card">
+        <h2>Login</h2>
+        <label for="loginUsername">Username</label>
+        <input id="loginUsername" value="admin">
+        <label for="loginPassword">Password</label>
+        <input id="loginPassword" type="password" value="admin">
+        <button class="btn-primary" onclick="login()">Login</button>
+        <pre id="loginResult"></pre>
+    </div>
+
+    <div id="authSection" class="hidden">
+        <div class="card">
+            <h2>Logout</h2>
+            <button class="btn-danger" onclick="logout()">Logout</button>
+            <pre id="logoutResult"></pre>
+        </div>
+
+        <div class="card">
+            <h2>Change Password</h2>
+            <label for="oldPassword">Old Password</label>
+            <input id="oldPassword" type="password">
+            <label for="newPassword">New Password</label>
+            <input id="newPassword" type="password">
+            <button class="btn-success" onclick="changePassword()">Change Password</button>
+            <pre id="changePasswordResult"></pre>
+        </div>
+    </div>
+
+    <script>
+        let token = localStorage.getItem("token");
+
+        function updateAuthSection() {
+            document.getElementById("authSection").classList.toggle("hidden", !token);
+        }
+
+        async function login() {
+            const username = document.getElementById("loginUsername").value;
+            const password = document.getElementById("loginPassword").value;
+            try {
+                const res = await fetch("/api/auth/login", {
+                    method: "POST",
+                    headers: { "Content-Type": "application/json" },
+                    body: JSON.stringify({username, password})
+                });
+                const data = await res.json();
+                document.getElementById("loginResult").textContent = JSON.stringify(data, null, 2);
+                if (res.ok) {
+                    token = data.token;
+                    localStorage.setItem("token", token);
+                    updateAuthSection();
+                }
+            } catch (e) {
+                document.getElementById("loginResult").textContent = e;
+            }
+        }
+
+        async function logout() {
+            try {
+                const res = await fetch("/api/auth/logout", {
+                    method: "POST",
+                    headers: { "Authorization": "Bearer " + token }
+                });
+                document.getElementById("logoutResult").textContent = "Status: " + res.status;
+                token = null;
+                localStorage.removeItem("token");
+                updateAuthSection();
+            } catch (e) {
+                document.getElementById("logoutResult").textContent = e;
+            }
+        }
+
+        async function changePassword() {
+            const oldPassword = document.getElementById("oldPassword").value;
+            const newPassword = document.getElementById("newPassword").value;
+            try {
+                const res = await fetch("/api/auth/change-password", {
+                    method: "POST",
+                    headers: {
+                        "Content-Type": "application/json",
+                        "Authorization": "Bearer " + token
+                    },
+                    body: JSON.stringify({oldPassword, newPassword})
+                });
+                const data = await res.json();
+                document.getElementById("changePasswordResult").textContent = JSON.stringify(data, null, 2);
+                if (res.ok) {
+                    token = null;
+                    localStorage.removeItem("token");
+                    updateAuthSection();
+                }
+            } catch (e) {
+                document.getElementById("changePasswordResult").textContent = e;
+            }
+        }
+
+        updateAuthSection();
+    </script>
+</body>
+</html>