diff --git a/hosts/carbon/configuration.nix b/hosts/carbon/configuration.nix
index de77a6e..31e2d55 100644
--- a/hosts/carbon/configuration.nix
+++ b/hosts/carbon/configuration.nix
@@ -115,9 +115,9 @@
   networking.firewall.allowedUDPPorts = [ 60001 ];
 
   networking.firewall.extraCommands = ''
-    iptables -A FORWARD -i enp1s0.202 -o enp1s0.102 -j ACCEPT
+    iptables -A FORWARD -i enp1s0.202 -o ppp-ntvdsl -j ACCEPT
     iptables -A FORWARD -i enp1s0.202 -j DROP
-    iptables -A FORWARD -i enp1s0.102 -o enp1s0.202 -j ACCEPT
+    iptables -A FORWARD -i ppp-ntvdsl -o enp1s0.202 -j ACCEPT
     iptables -A FORWARD -o enp1s0.202 -j DROP
   '';