diff --git a/hosts/carbon/configuration.nix b/hosts/carbon/configuration.nix
index 6cd4811..43584f6 100644
--- a/hosts/carbon/configuration.nix
+++ b/hosts/carbon/configuration.nix
@@ -255,6 +255,7 @@
   };
 
   networking.firewall.allowedUDPPorts = [ 53 60001 ];
+  networking.firewall.allowedTCPPorts = [ 53 ];
 
   networking.firewall.extraCommands = ''
     iptables -A FORWARD -i enp1s0.202 -o ppp-ntvdsl -j ACCEPT