diff --git a/spec/eientei/default.nix b/spec/eientei/default.nix
index 6f7bcbdb..b87cf794 100644
--- a/spec/eientei/default.nix
+++ b/spec/eientei/default.nix
@@ -14,6 +14,7 @@
     fs.cryptsetup.allowDiscards = false;
     fs.cryptsetup.uuids.secret = "c33c9b18-a280-42d7-8740-3f8d3f60dc43";
     boot.lanzaboote = true;
+    boot.memtest = 4;
     acme.enable = true;
     oci.enable = true;
   };
@@ -32,6 +33,11 @@
   };
   boot.initrd.systemd.services.zfs-import-eientei.after = [ "cryptsetup.target" ];
 
+  services.udev.extraRules = ''
+    SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="80:61:5f:07:9e:2f", NAME="ix0"
+    SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="00:e0:4c:68:bb:30", NAME="ss0"
+  '';
+
   networking.proxy = {
     allProxy = "socks5://192.168.1.253:1080";
     noProxy = "10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,127.0.0.1,localhost,.localdomain";