diff --git a/configuration/router/default.nix b/configuration/router/default.nix
index 4a17e71..afc974e 100644
--- a/configuration/router/default.nix
+++ b/configuration/router/default.nix
@@ -20,10 +20,8 @@
 
   networking.firewall.extraCommands = ''
     # Open fireall for OSPF
-    ip6tables -A INPUT -p ospfigp -j ACCEPT
-    iptables -A INPUT -p ospfigp -j ACCEPT
+    ip46tables -A nixos-fw -p ospfigp -j nixos-fw-accept
     # Open firewall for GRE
-    ip6tables -A INPUT -p gre -j ACCEPT
-    iptables -A INPUT -p gre -j ACCEPT
+    ip46tables -A nixos-fw -p gre -j nixos-fw-accept
   '';
 }