diff --git a/modules/common/networking.nix b/modules/common/networking.nix
new file mode 100644
index 0000000..e546db9
--- /dev/null
+++ b/modules/common/networking.nix
@@ -0,0 +1,14 @@
+{
+  networking.firewall.allowedTCPPorts =
+    [ 80 443 25 465 587 110 995 143 993 29418 ];
+
+  networking.hosts = {
+    "127.0.0.1" = [ "standard" ];
+    "127.0.0.2" = [ "clicks" ];
+    "127.0.0.3" = [ "caramels" ];
+    "127.0.0.255" = [ "generic" ];
+
+    "192.168.0.4" = [ "CodedPi" ];
+    "192.168.0.5" = [ "SamuelDesktop" ];
+  };
+}