hosts/toaster/network.nix


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

{ config, pkgs, ... }: {
  environment.systemPackages = with pkgs; [ iwgtk ];

  networking = {
    hostName = "toaster";
    firewall.enable = true;
    wireguard.enable = true;
  };

  services.resolved = {
    enable = true;
    dnssec = "allow-downgrade";
    fallbackDns = [
      "9.9.9.9"
      "2620:fe::fe"
      "149.112.112.112"
      "2620:fe::9"
    ];
  };

  # fixup the rpfilter fucking up the networkmanager wireguard
  networking.firewall = {
    # if packets are still dropped, they will show up in dmesg
    logReversePathDrops = true;
    # wireguard trips rpfilter up
    extraCommands = ''
      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --sport 51820 -j RETURN
      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --dport 51820 -j RETURN
      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --sport 1337 -j RETURN
      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --dport 1337 -j RETURN
    '';
    extraStopCommands = ''
      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --sport 51820 -j RETURN || true
      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --dport 51820 -j RETURN || true
      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --sport 1337 -j RETURN || true
      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --dport 1337 -j RETURN || true
    '';
  };
}