diff --git a/config/net/upstream.nix b/config/net/upstream.nix
index 0a64d1b..b31d825 100644
--- a/config/net/upstream.nix
+++ b/config/net/upstream.nix
@@ -28,7 +28,7 @@ in
       role = "container";
     };
 
-    upstream4 = {
+    upstream4 = rec {
       forwardPorts = [
         { # http
           destination = "172.20.73.45";
@@ -329,7 +329,12 @@ in
           };
         };
       };
-      ospf.upstreamInstance = 8;
+      ospf = {
+        upstreamInstance = 8;
+        stubNets4 = [
+          "${interfaces.up4-pppoe.upstream.staticIpv4Address}/32"
+        ];
+      };
       role = "container";
     };