diff --git a/hosts/iron/configuration.nix b/hosts/iron/configuration.nix
index deff6ad..ff5cd67 100644
--- a/hosts/iron/configuration.nix
+++ b/hosts/iron/configuration.nix
@@ -48,20 +48,20 @@ with lib; {
       networkmanager.enable = false;
 
       interfaces = {
-        enp3s4.ipv4.addresses = [{
+        enp2s4.ipv4.addresses = [{
           address = "192.168.42.1";
           prefixLength = 24;
         }];
-        enp4s5 = {
+        enp3s5 = {
           useDHCP = true;
         };
       };
 
       nat = {
         enable = true;
-        externalInterface = "enp4s5";
+        externalInterface = "enp3s5";
         internalInterfaces = [
-          "enp3s4"
+          "enp2s4"
         ];
       };
 
@@ -75,7 +75,7 @@ with lib; {
     services.radvd = {
       enable = true;
       config = ''
-        interface enp3s4 {
+        interface enp2s4 {
           AdvSendAdvert on;
           prefix ::/64 {
             AdvOnLink on;
@@ -90,10 +90,10 @@ with lib; {
       noipv6rs
       waitip 6
 
-      interface enp4s5
+      interface enp3s5
         ipv6rs
         ia_na 1
-        ia_pd 1/::/64 enp3s4/0/64
+        ia_pd 1/::/64 enp2s4/0/64
     '';
 
     boot = {
diff --git a/hosts/iron/services/dyndns.nix b/hosts/iron/services/dyndns.nix
index 2c4b7a1..9b4aebf 100644
--- a/hosts/iron/services/dyndns.nix
+++ b/hosts/iron/services/dyndns.nix
@@ -11,7 +11,7 @@
     username = "nouser";
     passwordFile = config.sops.secrets.duckdns-secret.path;
     domains = [ "jalr-bw" ];
-    use = "if, if=enp4s5";
+    use = "if, if=enp3s5";
     #usev6=ifv6, ifv6=enp3s4
   };
 }