repo: ./nixos -> ./os

1 files changed, 43 insertions, 0 deletions

diff --git a/os/kay/modules/router.nix b/os/kay/modules/router.nix
new file mode 100644
index 0000000..2254c3b
--- /dev/null
+++ b/os/kay/modules/router.nix
@@ -0,0 +1,43 @@
+{ ... }:
+
+let
+  lanInterface = "enp0s20u1";
+  wanInterface = "ppp0";
+  subnet = "10.0.0.0";
+  prefix = 24;
+  host = "10.0.0.1";
+  leaseRangeStart = "10.0.0.100";
+  leaseRangeEnd = "10.0.0.254";
+in
+{
+  imports = [
+    ./wireguard.nix
+    ./iperf3.nix
+  ];
+
+  networking = {
+    nat = {
+      enable = true;
+      externalInterface = wanInterface;
+      internalInterfaces = [ lanInterface ];
+    };
+    interfaces."${lanInterface}" = {
+      ipv4.addresses = [{ 
+        address = host;
+        prefixLength  = prefix;
+      }];
+    };
+    firewall = {
+      allowedUDPPorts = [ 53 67 ];
+      allowedTCPPorts = [ 53 ];
+      extraCommands = ''
+        iptables -t nat -I POSTROUTING 1 -s ${subnet}/${toString prefix} -o ${wanInterface} -j MASQUERADE
+      '';
+    };
+  };
+
+  services.dnsmasq.settings = {
+    dhcp-range = [ "${leaseRangeStart},${leaseRangeEnd}" ];
+    interface = [ lanInterface ];
+  };
+}