hosts/mermet/networking/wireguard.nix

   1 { pkgs, lib, config, hostName, inputs, ... }:
   2 let
   3   inherit (config.security.gnupg) secrets;
   4   iface = "wg-intra";
   5   wg = config.networking.wireguard.interfaces.${iface};
   6   wg-intra-peers = import (inputs.julm-nix + "/nixos/profiles/wireguard/wg-intra/peers.nix");
   7 in
   8 {
   9 imports = [
  10   (inputs.julm-nix + "/nixos/profiles/wireguard/wg-intra.nix")
  11 ];
  12 config = {
  13 networking.wireguard.${iface}.peers = {
  14   losurdo.enable = true;
  15   oignon.enable = true;
  16   patate.enable = true;
  17 };
  18 networking.nftables.ruleset = ''
  19   # Allow peers to initiate connection for ${iface}
  20   add rule inet filter net2fw udp dport ${toString wg.listenPort} counter accept comment "${iface}"
  21
  22   # Hook ${iface} into relevant chains
  23   add rule inet filter input  iifname "${iface}" jump intra2fw
  24   add rule inet filter input  iifname "${iface}" log level warn prefix "intra2fw: " counter drop
  25   add rule inet filter output oifname "${iface}" jump fw2intra
  26   add rule inet filter output oifname "${iface}" log level warn prefix "fw2intra: " counter drop
  27
  28   # ${iface} firewalling
  29   add rule inet filter fw2intra counter accept
  30   add rule inet filter intra2fw tcp dport ${toString wg.peersAnnouncing.listenPort} counter accept comment "WireGuard peers announcing"
  31   add rule inet filter intra2fw ip saddr ${wg-intra-peers.losurdo.ipv4} counter accept comment "losurdo"
  32 '';
  33 };
  34 }