diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Configuration/KestrelHttpBinding.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Configuration/KestrelHttpBinding.cs
index 43b52de1..dcf343d2 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Configuration/KestrelHttpBinding.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Configuration/KestrelHttpBinding.cs
@@ -49,6 +49,33 @@ public sealed record KestrelHttpBinding(string Host, int Port, bool IsSecure)
         return result;
     }
 
+    /// <summary>
+    ///     Parses the bare-port list format of <c>ASPNETCORE_HTTP_PORTS</c> / <c>HTTP_PORTS</c> (and
+    ///     the <c>HTTPS</c> variants) into wildcard (<c>+</c>, all-interfaces) bindings — the shape
+    ///     Kestrel itself gives those variables. Modern .NET base images (aspnet:8.0+) set
+    ///     <c>ASPNETCORE_HTTP_PORTS=8080</c> as the container default <b>instead of</b>
+    ///     <c>ASPNETCORE_URLS</c>, so a node that never sets <c>URLS</c> explicitly still has a real
+    ///     configured surface here that must be re-bound, not replaced with Kestrel's localhost:5000.
+    /// </summary>
+    /// <param name="ports">A <c>;</c>- or <c>,</c>-separated list of bare ports, or null/empty.</param>
+    /// <param name="isSecure">True to mark the parsed bindings <c>https</c> (the <c>HTTPS_PORTS</c> vars).</param>
+    /// <returns>One all-interfaces binding per parseable port; empty when nothing is configured.</returns>
+    public static IReadOnlyList<KestrelHttpBinding> ParsePorts(string? ports, bool isSecure)
+    {
+        if (string.IsNullOrWhiteSpace(ports))
+            return [];
+
+        var result = new List<KestrelHttpBinding>();
+        foreach (var token in ports.Split([';', ','], StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+        {
+            // Skip a malformed port rather than throwing — a bad env var must not down startup.
+            if (int.TryParse(token, out var port) && port is > 0 and <= 65535)
+                result.Add(new KestrelHttpBinding("+", port, isSecure));
+        }
+
+        return result;
+    }
+
     /// <summary>
     ///     Applies this binding to Kestrel, choosing the narrowest listen call the host component
     ///     allows.
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
index 1c772c56..b9de794b 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
@@ -399,11 +399,32 @@ builder.Services.AddOtOpcUaObservability(builder.Configuration);
 var syncListenPort = LocalDbRegistration.SyncListenPort(builder.Configuration);
 if (hasDriver && syncListenPort > 0)
 {
+    // Mirror Kestrel's own source precedence: URLS wins; else the HTTP_PORTS/HTTPS_PORTS bare-port
+    // vars; else Kestrel's localhost:5000 default. Missing the HTTP_PORTS leg is not academic — the
+    // aspnet:8.0+ base images set ASPNETCORE_HTTP_PORTS=8080 as the CONTAINER default in place of
+    // ASPNETCORE_URLS, so a driver node that never sets URLS is really serving :8080 on all
+    // interfaces. Falling straight through to localhost:5000 would silently move its health/metrics
+    // surface to loopback (found on the docker-dev live gate).
     var configuredUrls = builder.Configuration["urls"]
                       ?? builder.Configuration["ASPNETCORE_URLS"];
     var existingBindings = KestrelHttpBinding.Parse(configuredUrls);
 
-    // A driver-only Windows-service node gets NO ASPNETCORE_URLS (Install-Services.ps1 sets it
+    if (existingBindings.Count == 0)
+    {
+        var httpPorts = builder.Configuration["ASPNETCORE_HTTP_PORTS"] ?? builder.Configuration["HTTP_PORTS"];
+        var httpsPorts = builder.Configuration["ASPNETCORE_HTTPS_PORTS"] ?? builder.Configuration["HTTPS_PORTS"];
+        existingBindings =
+        [
+            .. KestrelHttpBinding.ParsePorts(httpPorts, isSecure: false),
+            .. KestrelHttpBinding.ParsePorts(httpsPorts, isSecure: true),
+        ];
+        if (existingBindings.Count > 0)
+            Log.Information(
+                "LocalDb sync listener enabled; re-binding the HTTP_PORTS surface ({HttpPorts}/{HttpsPorts}) " +
+                "alongside the sync port.", httpPorts, httpsPorts);
+    }
+
+    // A driver-only Windows-service node gets NO URLS and NO *_PORTS (Install-Services.ps1 sets URLS
     // only under $hasAdmin), so "nothing configured" is a real, supported state — not an error.
     // Kestrel's own default is localhost:5000; re-state it explicitly, because taking over
     // configuration means taking over the default too. Health probes hit this port.
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Host.IntegrationTests/LocalDbSyncListenerTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Host.IntegrationTests/LocalDbSyncListenerTests.cs
index 0a1c69cc..58e25082 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.Host.IntegrationTests/LocalDbSyncListenerTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Host.IntegrationTests/LocalDbSyncListenerTests.cs
@@ -88,6 +88,43 @@ public sealed class LocalDbSyncListenerTests
         KestrelHttpBinding.Parse("not a url;http://+:9000").ShouldHaveSingleItem().Port.ShouldBe(9000);
     }
 
+    // ---- ParsePorts (ASPNETCORE_HTTP_PORTS / HTTPS_PORTS) ----------------------------------
+
+    [Fact]
+    public void ParsePorts_NullOrEmpty_YieldsNoBindings()
+    {
+        KestrelHttpBinding.ParsePorts(null, isSecure: false).ShouldBeEmpty();
+        KestrelHttpBinding.ParsePorts("", isSecure: false).ShouldBeEmpty();
+        KestrelHttpBinding.ParsePorts("  ", isSecure: false).ShouldBeEmpty();
+    }
+
+    [Fact]
+    public void ParsePorts_BarePort_BindsAllInterfaces()
+    {
+        // The aspnet:8.0+ container default is ASPNETCORE_HTTP_PORTS=8080, on all interfaces — not
+        // loopback. Re-binding it as a wildcard is what keeps a driver node's health/metrics surface
+        // reachable from other containers once the sync listener takes over Kestrel.
+        var binding = KestrelHttpBinding.ParsePorts("8080", isSecure: false).ShouldHaveSingleItem();
+        binding.Host.ShouldBe("+");
+        binding.Port.ShouldBe(8080);
+        binding.IsSecure.ShouldBeFalse();
+    }
+
+    [Fact]
+    public void ParsePorts_SeparatedList_AndSecureFlag()
+    {
+        KestrelHttpBinding.ParsePorts("8080;8081", isSecure: false).Select(b => b.Port).ShouldBe([8080, 8081]);
+        KestrelHttpBinding.ParsePorts("8080,8081", isSecure: false).Select(b => b.Port).ShouldBe([8080, 8081]);
+        KestrelHttpBinding.ParsePorts("443", isSecure: true).ShouldHaveSingleItem().IsSecure.ShouldBeTrue();
+    }
+
+    [Fact]
+    public void ParsePorts_MalformedPort_IsSkipped_NotThrown()
+    {
+        KestrelHttpBinding.ParsePorts("notaport;8080;0;70000", isSecure: false)
+            .ShouldHaveSingleItem().Port.ShouldBe(8080);
+    }
+
     // ---------------------------------------------------------------------------------------
     // The real Kestrel contract
     // ---------------------------------------------------------------------------------------