diff --git a/nixos/boxes/britway/bgp.nix b/nixos/boxes/britway/bgp.nix
index 11f408d..7ff13a9 100644
--- a/nixos/boxes/britway/bgp.nix
+++ b/nixos/boxes/britway/bgp.nix
@@ -92,7 +92,10 @@ in
           protocol kernel kernel6 {
             ipv6 {
               import none;
-              export none;
+              export filter {
+                if net = HOMENET6 then accept;
+                reject;
+              };
             };
           }