diff --git a/nix/os/devices/fwhost1/system.nix b/nix/os/devices/fwhost1/system.nix
index eb78072..75a5355 100644
--- a/nix/os/devices/fwhost1/system.nix
+++ b/nix/os/devices/fwhost1/system.nix
@@ -44,15 +44,12 @@ in {
 
   networking.vlans.dmz.id = 5;
   networking.vlans.dmz.interface = "breth";
-  networking.interfaces.dmz.ipv4.addresses = [{ address = "172.172.175.15"; prefixLength = 24; } ];
 
   networking.vlans.family.id = 6;
   networking.vlans.family.interface = "breth";
-  networking.interfaces.family.ipv4.addresses = [{ address = "172.172.176.15"; prefixLength = 24; } ];
 
   networking.vlans.guests.id = 7;
   networking.vlans.guests.interface = "breth";
-  networking.interfaces.guests.ipv4.addresses = [{ address = "172.172.177.15"; prefixLength = 24; } ];
 
   services.hostapd = {
     enable = false;
diff --git a/nix/os/devices/fwhost2/system.nix b/nix/os/devices/fwhost2/system.nix
index f6a60b7..7cee7c4 100644
--- a/nix/os/devices/fwhost2/system.nix
+++ b/nix/os/devices/fwhost2/system.nix
@@ -45,15 +45,12 @@ in {
 
   networking.vlans.dmz.id = 5;
   networking.vlans.dmz.interface = "breth";
-  networking.interfaces.dmz.ipv4.addresses = [{ address = "172.172.175.16"; prefixLength = 24; } ];
 
   networking.vlans.family.id = 6;
   networking.vlans.family.interface = "breth";
-  networking.interfaces.family.ipv4.addresses = [{ address = "172.172.176.16"; prefixLength = 24; } ];
 
   networking.vlans.guests.id = 7;
   networking.vlans.guests.interface = "breth";
-  networking.interfaces.guests.ipv4.addresses = [{ address = "172.172.177.16"; prefixLength = 24; } ];
 
   services.hostapd = {
     enable = false;