diff --git a/router/java/src/net/i2p/router/transport/Transport.java b/router/java/src/net/i2p/router/transport/Transport.java
index 4bd26aac6..c71607809 100644
--- a/router/java/src/net/i2p/router/transport/Transport.java
+++ b/router/java/src/net/i2p/router/transport/Transport.java
@@ -201,6 +201,20 @@ public interface Transport {
      */
     public TransportUtil.IPv6Config getIPv6Config();
 
+    /**
+     *  This returns true if the force-firewalled setting is configured, false otherwise.
+     *
+     *  @since 0.9.50 added to interface
+     */
+    public boolean isIPv4Firewalled();
+
+    /**
+     *  This returns true if the force-firewalled setting is configured, false otherwise.
+     *
+     *  @since 0.9.50 added to interface
+     */
+    public boolean isIPv6Firewalled();
+
     public boolean isBacklogged(Hash peer);
 
     /**
diff --git a/router/java/src/net/i2p/router/transport/TransportManager.java b/router/java/src/net/i2p/router/transport/TransportManager.java
index 9b895c712..68882f110 100644
--- a/router/java/src/net/i2p/router/transport/TransportManager.java
+++ b/router/java/src/net/i2p/router/transport/TransportManager.java
@@ -801,11 +801,14 @@ public class TransportManager implements TransportEventListener {
             if (port > 0) {
                 TransportUtil.IPv6Config config = t.getIPv6Config();
                 // ipv4
-                if (config != TransportUtil.IPv6Config.IPV6_ONLY)
+                if (config != TransportUtil.IPv6Config.IPV6_ONLY &&
+                    !t.isIPv4Firewalled()) {
                     rv.add(new Port(t.getStyle(), port));
+                }
                 // ipv6
                 if (_context.getProperty(PROP_ENABLE_UPNP_IPV6, DEFAULT_ENABLE_UPNP_IPV6) &&
-                    config != TransportUtil.IPv6Config.IPV6_DISABLED) {
+                    config != TransportUtil.IPv6Config.IPV6_DISABLED &&
+                    !t.isIPv6Firewalled()) {
                     RouterAddress ra = t.getCurrentAddress(true);
                     if (ra == null) {
                         if (t.getStyle().equals(UDPTransport.STYLE)) {