diff --git a/docker-compose.yml b/docker-compose.yml
index 6ac7862..aae6f03 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,7 +12,7 @@ services:
       PLATFORM: docker
       DB_NAME: /data/db/acc.db
       STEAMCMD_LINUX_PATH: /usr/games/steamcmd
-      PORT_POOL_MIN: "9601"
+      PORT_POOL_MIN: "9600"
       PORT_POOL_MAX: "9699"
       ACC_IMAGE: acc-wine:latest
       ACC_SERVERS_PATH: /data/servers
diff --git a/docker/acc-server/Dockerfile b/docker/acc-server/Dockerfile
index 47e0bd0..0e67a18 100644
--- a/docker/acc-server/Dockerfile
+++ b/docker/acc-server/Dockerfile
@@ -1,6 +1,5 @@
 # ACC Server container: Wine + accServer.exe
-# Game files are mounted read-only from the shared acc-game volume.
-# Per-server config files are mounted read-write from the manager's config volume.
+# Game files are bind-mounted from the host at /acc/game.
 FROM debian:bookworm-slim
 
 # Install Wine, Xvfb (headless display for Wine), and minimal runtime deps.
@@ -12,6 +11,7 @@ RUN dpkg --add-architecture i386 && \
         wine64 \
         xvfb \
         ca-certificates \
+        tcpdump \
         && \
     rm -rf /var/lib/apt/lists/*
 
@@ -19,6 +19,10 @@ RUN mkdir -p /tmp/.X11-unix && chmod 1777 /tmp/.X11-unix
 
 WORKDIR /root
 
+ENV WINEARCH=win64
+ENV WINEPREFIX=/root/.wine
+ENV WINEDEBUG=-all
+
 # Copy entrypoint script.
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
@@ -26,11 +30,6 @@ RUN chmod +x /entrypoint.sh
 # Bind-mounted by DockerRuntime.Create: per-server game install (rw)
 VOLUME ["/acc/game"]
 
-# Default server port — overridden at runtime via SERVER_PORT env var.
 ENV SERVER_PORT=9600
-ENV WINEDEBUG=-all
-
-EXPOSE ${SERVER_PORT}/tcp
-EXPOSE ${SERVER_PORT}/udp
 
 ENTRYPOINT ["/entrypoint.sh"]
diff --git a/docker/acc-server/entrypoint.sh b/docker/acc-server/entrypoint.sh
index 67d6e1b..784273d 100644
--- a/docker/acc-server/entrypoint.sh
+++ b/docker/acc-server/entrypoint.sh
@@ -1,26 +1,78 @@
 #!/bin/bash
 set -e
 
-# Use a display number derived from the server port to avoid conflicts
-# between containers (each server gets its own unique display).
 DISPLAY_NUM=$((SERVER_PORT % 1000 + 100))
 export DISPLAY=:${DISPLAY_NUM}
 
-# Clean up any stale X lock from a previous container run.
 rm -f /tmp/.X${DISPLAY_NUM}-lock /tmp/.X11-unix/X${DISPLAY_NUM} 2>/dev/null || true
 
 Xvfb ${DISPLAY} -screen 0 1024x768x16 -nolisten tcp &
 XVFB_PID=$!
 
+TCPDUMP_PID=""
+
 cleanup() {
     echo "Stopping ACC server..."
-    kill $XVFB_PID 2>/dev/null || true
+    [ -n "${TCPDUMP_PID}" ] && kill "${TCPDUMP_PID}" 2>/dev/null || true
+    kill "${XVFB_PID}" 2>/dev/null || true
 }
-trap cleanup SIGTERM SIGINT
+trap cleanup SIGTERM SIGINT EXIT
+
+# Initialize Wine prefix (no-op if already done)
+wineboot -u 2>/dev/null
 
 mkdir -p /acc/game/log
 
-echo "Starting ACC server on port ${SERVER_PORT}..."
+# ─── Debug mode ───────────────────────────────────────────────────────────────
+# Set DEBUG_MODE=1 on the container to enable extra diagnostics:
+#
+#   docker run -e DEBUG_MODE=1 ...
+#   or in docker-compose:
+#     environment:
+#       DEBUG_MODE: "1"
+#
+# Produces:
+#   /acc/game/log/tcpdump_<port>.pcap  — raw packet capture (open in Wireshark)
+#   /acc/game/log/wine_debug.log       — Wine debug output
+#   Stderr: Wine version, WINEDEBUG channel, prefix state
+#
+# You can also override which Wine debug channels are enabled:
+#   WINEDEBUG_CHANNELS="+loaddll,+seh,+relay"  (relay is very verbose)
+# ─────────────────────────────────────────────────────────────────────────────
+if [ "${DEBUG_MODE:-0}" = "1" ]; then
+    echo "[debug] Debug mode enabled for port ${SERVER_PORT}"
+    echo "[debug] Wine: $(wine --version 2>/dev/null || echo unknown)"
+    echo "[debug] WINEPREFIX: ${WINEPREFIX}"
 
-cd /acc/game
-exec wine /acc/game/accServer.exe
+    # Configure Wine debug channels (default: loader + exception + module info)
+    export WINEDEBUG="${WINEDEBUG_CHANNELS:-+loaddll,+module,+seh,+ntdll}"
+    echo "[debug] WINEDEBUG=${WINEDEBUG}"
+
+    # Start packet capture on the server port — captures both TCP and UDP.
+    # The pcap file records every byte Kunos sends/receives so you can inspect
+    # the 2-byte "pakSizeMax" packet and anything that follows.
+    #
+    # NOTE: requires CAP_NET_RAW capability on the container:
+    #   docker-compose: cap_add: [NET_RAW]
+    #   docker run: --cap-add=NET_RAW
+    # Without it tcpdump will be skipped (no crash, just no capture).
+    CAPTURE_FILE="/acc/game/log/tcpdump_${SERVER_PORT}.pcap"
+    echo "[debug] Starting packet capture → ${CAPTURE_FILE}"
+    echo "[debug] (requires cap_add: [NET_RAW] in docker-compose — will exit silently if missing)"
+    tcpdump -i any -nn -s 0 -w "${CAPTURE_FILE}" \
+        "port ${SERVER_PORT}" 2>/acc/game/log/tcpdump.err &
+    TCPDUMP_PID=$!
+
+    # Redirect Wine debug output to a log file (Wine writes to stderr).
+    WINE_LOG="/acc/game/log/wine_debug.log"
+    echo "[debug] Wine debug log → ${WINE_LOG}"
+    echo "Starting ACC server on port ${SERVER_PORT} (DEBUG)..."
+    cd /acc/game
+    exec wine /acc/game/accServer.exe 2>"${WINE_LOG}"
+else
+    # Production: suppress all Wine debug output.
+    export WINEDEBUG=-all
+    echo "Starting ACC server on port ${SERVER_PORT}..."
+    cd /acc/game
+    exec wine /acc/game/accServer.exe
+fi
diff --git a/local/service/config.go b/local/service/config.go
index 09363f1..8b45e3e 100755
--- a/local/service/config.go
+++ b/local/service/config.go
@@ -420,6 +420,14 @@ func (as *ConfigService) GetConfiguration(server *model.Server) (*model.Configur
 	return &config, nil
 }
 
+func (as *ConfigService) SetIgnorePrematureDisconnects(server *model.Server, value int) error {
+	configMap := map[string]interface{}{
+		"ignorePrematureDisconnects": value,
+	}
+	_, _, err := as.updateConfigFiles(context.Background(), server, SettingsJson, &configMap, false)
+	return err
+}
+
 func (as *ConfigService) SaveConfiguration(server *model.Server, config *model.Configuration) error {
 	configMap := make(map[string]interface{})
 	configBytes, err := json.Marshal(config)
diff --git a/local/service/docker_runtime.go b/local/service/docker_runtime.go
index 7ecd23d..addcc16 100644
--- a/local/service/docker_runtime.go
+++ b/local/service/docker_runtime.go
@@ -33,21 +33,21 @@ func NewDockerRuntime(client *dockerclient.Client, repo *repository.ServerReposi
 
 func (r *DockerRuntime) Create(ctx context.Context, server *model.Server) error {
 	image := env.GetACCImage()
-	tcpPortStr := strconv.Itoa(server.Port)
-	udpPortStr := strconv.Itoa(server.Port - 1)
+	// ACC uses the same port number for both TCP (client connections) and UDP (car positions/ping).
+	portStr := strconv.Itoa(server.Port)
 
-	natTCP, err := nat.NewPort("tcp", tcpPortStr)
+	natTCP, err := nat.NewPort("tcp", portStr)
 	if err != nil {
-		return fmt.Errorf("invalid tcp port %d: %v", server.Port, err)
+		return fmt.Errorf("invalid port %d: %v", server.Port, err)
 	}
-	natUDP, err := nat.NewPort("udp", udpPortStr)
+	natUDP, err := nat.NewPort("udp", portStr)
 	if err != nil {
-		return fmt.Errorf("invalid udp port %d: %v", server.Port-1, err)
+		return fmt.Errorf("invalid port %d: %v", server.Port, err)
 	}
 
 	portBindings := nat.PortMap{
-		natTCP: []nat.PortBinding{{HostPort: tcpPortStr}},
-		natUDP: []nat.PortBinding{{HostPort: udpPortStr}},
+		natTCP: []nat.PortBinding{{HostPort: portStr}},
+		natUDP: []nat.PortBinding{{HostPort: portStr}},
 	}
 	exposedPorts := nat.PortSet{
 		natTCP: struct{}{},
@@ -73,6 +73,8 @@ func (r *DockerRuntime) Create(ctx context.Context, server *model.Server) error
 		Binds:         binds,
 		PortBindings:  portBindings,
 		RestartPolicy: container.RestartPolicy{Name: "unless-stopped"},
+		// NET_RAW is required for tcpdump packet capture in debug mode (DEBUG_MODE=1).
+		CapAdd: []string{"NET_RAW"},
 	}, nil, nil, server.ServiceName)
 	if err != nil {
 		return fmt.Errorf("failed to create container %s: %v", server.ServiceName, err)
@@ -104,10 +106,19 @@ func (r *DockerRuntime) Delete(ctx context.Context, serverID uuid.UUID) error {
 }
 
 func (r *DockerRuntime) Start(ctx context.Context, serverID uuid.UUID) (string, error) {
-	containerID, err := r.resolveContainerID(ctx, serverID)
+	server, err := r.repo.GetByID(ctx, serverID)
+	if err != nil {
+		return "", fmt.Errorf("failed to look up server %s: %v", serverID, err)
+	}
+	if server == nil {
+		return "", fmt.Errorf("server %s not found", serverID)
+	}
+
+	containerID, err := r.ensureContainer(ctx, server)
 	if err != nil {
 		return "", err
 	}
+
 	if err := r.client.ContainerStart(ctx, containerID, types.ContainerStartOptions{}); err != nil {
 		return "", fmt.Errorf("failed to start container: %v", err)
 	}
@@ -126,16 +137,44 @@ func (r *DockerRuntime) Stop(ctx context.Context, serverID uuid.UUID) (string, e
 }
 
 func (r *DockerRuntime) Restart(ctx context.Context, serverID uuid.UUID) (string, error) {
-	containerID, err := r.resolveContainerID(ctx, serverID)
+	server, err := r.repo.GetByID(ctx, serverID)
+	if err != nil {
+		return "", fmt.Errorf("failed to look up server %s: %v", serverID, err)
+	}
+	if server == nil {
+		return "", fmt.Errorf("server %s not found", serverID)
+	}
+
+	containerID, err := r.ensureContainer(ctx, server)
 	if err != nil {
 		return "", err
 	}
+
 	if err := r.client.ContainerRestart(ctx, containerID, container.StopOptions{}); err != nil {
 		return "", fmt.Errorf("failed to restart container: %v", err)
 	}
 	return model.StatusRunning.String(), nil
 }
 
+// ensureContainer returns the container ID for a server, recreating the container
+// from the server's current DB record if it no longer exists in Docker.
+func (r *DockerRuntime) ensureContainer(ctx context.Context, server *model.Server) (string, error) {
+	if server.ContainerID != "" {
+		if _, err := r.client.ContainerInspect(ctx, server.ContainerID); err == nil {
+			return server.ContainerID, nil
+		}
+		logging.Info("Container %s for server %s no longer exists, recreating", server.ContainerID[:min(12, len(server.ContainerID))], server.ID)
+	}
+
+	if err := r.Create(ctx, server); err != nil {
+		return "", fmt.Errorf("failed to recreate container: %v", err)
+	}
+	if err := r.repo.Update(ctx, server); err != nil {
+		return "", fmt.Errorf("container recreated but failed to persist container ID: %v", err)
+	}
+	return server.ContainerID, nil
+}
+
 func (r *DockerRuntime) Status(ctx context.Context, serverID uuid.UUID) (string, error) {
 	server, err := r.repo.GetByID(ctx, serverID)
 	if err != nil || server == nil {
diff --git a/local/service/server.go b/local/service/server.go
index 3318111..84e8325 100755
--- a/local/service/server.go
+++ b/local/service/server.go
@@ -574,10 +574,17 @@ func (s *ServerService) updateServerPort(server *model.Server, port int) error {
 
 	config.TcpPort = model.IntString(port)
 	config.UdpPort = model.IntString(port)
+	config.RegisterToLobby = model.IntString(1)
 
 	if err := s.configService.SaveConfiguration(server, config); err != nil {
 		return fmt.Errorf("failed to save server configuration: %v", err)
 	}
 
+	if env.IsDockerPlatform() {
+		if err := s.configService.SetIgnorePrematureDisconnects(server, 0); err != nil {
+			logging.Error("Failed to set ignorePrematureDisconnects for Docker server: %v", err)
+		}
+	}
+
 	return nil
 }
diff --git a/tests/test_helper.go b/tests/test_helper.go
index b6d0132..b029921 100755
--- a/tests/test_helper.go
+++ b/tests/test_helper.go
@@ -109,7 +109,7 @@ func createTestData(t *testing.T, tempDir string) *TestData {
 	configFiles := map[string]string{
 		"configuration.json": `{
 			"udpPort": "9231",
-			"tcpPort": "9232",
+			"tcpPort": "9231",
 			"maxConnections": "30",
 			"lanDiscovery": "1",
 			"registerToLobby": "1",
@@ -198,7 +198,7 @@ func createTestData(t *testing.T, tempDir string) *TestData {
 
 	sampleConfig := &model.Configuration{
 		UdpPort:         model.IntString(9231),
-		TcpPort:         model.IntString(9232),
+		TcpPort:         model.IntString(9231),
 		MaxConnections:  model.IntString(30),
 		LanDiscovery:    model.IntString(1),
 		RegisterToLobby: model.IntString(1),
diff --git a/tests/unit/controller/controller_simple_test.go b/tests/unit/controller/controller_simple_test.go
index e01581c..cd14601 100755
--- a/tests/unit/controller/controller_simple_test.go
+++ b/tests/unit/controller/controller_simple_test.go
@@ -294,7 +294,7 @@ func TestController_ConfigurationModel_JSONSerialization(t *testing.T) {
 	app.Get("/config", func(c *fiber.Ctx) error {
 		config := &model.Configuration{
 			UdpPort:         model.IntString(9231),
-			TcpPort:         model.IntString(9232),
+			TcpPort:         model.IntString(9231),
 			MaxConnections:  model.IntString(30),
 			LanDiscovery:    model.IntString(1),
 			RegisterToLobby: model.IntString(1),
@@ -316,7 +316,7 @@ func TestController_ConfigurationModel_JSONSerialization(t *testing.T) {
 	tests.AssertNoError(t, err)
 
 	tests.AssertEqual(t, model.IntString(9231), response.UdpPort)
-	tests.AssertEqual(t, model.IntString(9232), response.TcpPort)
+	tests.AssertEqual(t, model.IntString(9231), response.TcpPort)
 	tests.AssertEqual(t, model.IntString(30), response.MaxConnections)
 	tests.AssertEqual(t, model.IntString(1), response.LanDiscovery)
 	tests.AssertEqual(t, model.IntString(1), response.RegisterToLobby)
diff --git a/tests/unit/service/cache_service_test.go b/tests/unit/service/cache_service_test.go
index 95862af..2d69942 100755
--- a/tests/unit/service/cache_service_test.go
+++ b/tests/unit/service/cache_service_test.go
@@ -464,7 +464,7 @@ func TestServerConfigCache_Configuration(t *testing.T) {
 	serverID := uuid.New().String()
 	configuration := model.Configuration{
 		UdpPort:         model.IntString(9231),
-		TcpPort:         model.IntString(9232),
+		TcpPort:         model.IntString(9231),
 		MaxConnections:  model.IntString(30),
 		LanDiscovery:    model.IntString(1),
 		RegisterToLobby: model.IntString(1),
diff --git a/tests/unit/service/config_service_test.go b/tests/unit/service/config_service_test.go
index 3d441e8..ecc3d41 100755
--- a/tests/unit/service/config_service_test.go
+++ b/tests/unit/service/config_service_test.go
@@ -27,7 +27,7 @@ func TestConfigService_GetConfiguration_ValidFile(t *testing.T) {
 	tests.AssertNotNil(t, config)
 
 	tests.AssertEqual(t, model.IntString(9231), config.UdpPort)
-	tests.AssertEqual(t, model.IntString(9232), config.TcpPort)
+	tests.AssertEqual(t, model.IntString(9231), config.TcpPort)
 	tests.AssertEqual(t, model.IntString(30), config.MaxConnections)
 	tests.AssertEqual(t, model.IntString(1), config.LanDiscovery)
 	tests.AssertEqual(t, model.IntString(1), config.RegisterToLobby)
@@ -122,7 +122,7 @@ func TestConfigService_LoadConfigs_Success(t *testing.T) {
 	tests.AssertNotNil(t, configs)
 
 	tests.AssertEqual(t, model.IntString(9231), configs.Configuration.UdpPort)
-	tests.AssertEqual(t, model.IntString(9232), configs.Configuration.TcpPort)
+	tests.AssertEqual(t, model.IntString(9231), configs.Configuration.TcpPort)
 	tests.AssertEqual(t, "Test ACC Server", configs.Settings.ServerName)
 	tests.AssertEqual(t, "admin123", configs.Settings.AdminPassword)
 	tests.AssertEqual(t, "spa", configs.Event.Track)
@@ -264,7 +264,7 @@ func TestConfigService_Caching_Configuration(t *testing.T) {
 	tests.AssertNotNil(t, config2)
 
 	tests.AssertEqual(t, model.IntString(9231), config2.UdpPort)
-	tests.AssertEqual(t, model.IntString(9232), config2.TcpPort)
+	tests.AssertEqual(t, model.IntString(9231), config2.TcpPort)
 }
 
 func TestConfigService_Caching_EventConfig(t *testing.T) {