diff --git a/system/kernighan.nix b/system/kernighan.nix
index 60734c1..a607d57 100644
--- a/system/kernighan.nix
+++ b/system/kernighan.nix
@@ -8,8 +8,22 @@
       ./kernighan-hardware.nix
     ];
 
-  networking.hostName = "kernighan";
-  networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+  networking = {
+    hostName = "kernighan";
+    interfaces = {
+       end0.ipv4.addresses = [{
+         address = "192.168.40.25";
+         prefixLength = 24;
+       }];
+       end0.ipv6.addresses = [{
+         address = "fe80::dea6:32ff:fe04:c6f3";
+         prefixLength = 64;
+       }];
+    };
+    defaultGateway = "192.168.40.1";
+    defaultGateway6 = "00:b8:c2:db:b8:57";
+    nameservers = [ "208.67.222.222" "208.67.220.220" ];
+  };
 
   boot.loader.grub.enable = false;
   boot.loader.generic-extlinux-compatible.enable = true;
@@ -18,10 +32,4 @@
     git
     vim
   ];
-
-  networking.firewall.allowedTCPPorts = [
-    22   # SSH
-    80   # HTTP
-    443  # HTTPS
-  ];
 }
diff --git a/system/shared-configuration.nix b/system/shared-configuration.nix
index 31e2444..b92ece0 100644
--- a/system/shared-configuration.nix
+++ b/system/shared-configuration.nix
@@ -32,6 +32,9 @@
       "tmux"
     ];
     initialPassword = "password";
+    openssh.authorizedKeys.keyFiles = [
+      ../users/tsv/authorized_keys
+    ];
   };
 
   nix.settings.trusted-users = [ "root" "tsv" ];
diff --git a/users/tsv/authorized_keys b/users/tsv/authorized_keys
new file mode 100644
index 0000000..e378498
--- /dev/null
+++ b/users/tsv/authorized_keys
@@ -0,0 +1,2 @@
+
+ssh-rsa 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 trevor@tsvallender.co.uk