diff --git a/libs/debian_service/proto/DebianService.proto b/libs/debian_service/proto/DebianService.proto
index 5adf615..5e3286a 100644
--- a/libs/debian_service/proto/DebianService.proto
+++ b/libs/debian_service/proto/DebianService.proto
@@ -23,12 +23,20 @@
 
 service DebianService {
   rpc ReportVmIpAddr (IpAddr) returns (ReportVmIpAddrResponse) {}
+  rpc OpenForwardingRequestQueue (Empty) returns (stream ForwardingRequestItem) {}
 }
 
+message Empty {}
+
 message IpAddr {
   string addr = 1;
 }
 
 message ReportVmIpAddrResponse {
-    bool success = 1;
-}
\ No newline at end of file
+  bool success = 1;
+}
+
+message ForwardingRequestItem {
+  int32 guest_tcp_port = 1;
+  int32 vsock_port = 2;
+}
diff --git a/libs/vm_launcher_lib/java/com/android/virtualization/vmlauncher/DebianServiceImpl.java b/libs/vm_launcher_lib/java/com/android/virtualization/vmlauncher/DebianServiceImpl.java
index 2f7666a..ccc0ed6 100644
--- a/libs/vm_launcher_lib/java/com/android/virtualization/vmlauncher/DebianServiceImpl.java
+++ b/libs/vm_launcher_lib/java/com/android/virtualization/vmlauncher/DebianServiceImpl.java
@@ -19,6 +19,8 @@
 import android.util.Log;
 
 import com.android.virtualization.vmlauncher.proto.DebianServiceGrpc;
+import com.android.virtualization.vmlauncher.proto.Empty;
+import com.android.virtualization.vmlauncher.proto.ForwardingRequestItem;
 import com.android.virtualization.vmlauncher.proto.IpAddr;
 import com.android.virtualization.vmlauncher.proto.ReportVmIpAddrResponse;
 
@@ -43,6 +45,16 @@
         responseObserver.onCompleted();
     }
 
+    @Override
+    public void openForwardingRequestQueue(
+            Empty request, StreamObserver<ForwardingRequestItem> responseObserver) {
+        Log.d(DebianServiceImpl.TAG, "OpenForwardingRequestQueue");
+
+        // TODO(b/340126051): Bring information from forwarder_host.
+
+        responseObserver.onCompleted();
+    }
+
     protected interface DebianServiceCallback {
         void onIpAddressAvailable(String ipAddr);
     }