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mermet: gitolite: update
[sourcephile-nix.git] / hosts / losurdo / wireguard / wg-intra.nix
1 { pkgs, lib, config, inputs, ... }:
2 let
3 inherit (config.boot) initrd;
4 wgIface = "wg-intra";
5 wg = config.networking.wireguard.interfaces.${wgIface};
6 wg-intra-peers = import (inputs.julm-nix + "/nixos/profiles/wireguard/wg-intra/peers.nix");
7 relay = wg-intra-peers.mermet;
8 in
9 {
10 imports = [
11 (inputs.julm-nix + "/nixos/profiles/wireguard/wg-intra.nix")
12 ];
13 systemd.services."wireguard-${wgIface}".serviceConfig.LoadCredentialEncrypted = [
14 "privateKey:${./. + "/${wgIface}/privateKey.cred"}"
15 ];
16 networking.wireguard.${wgIface}.peers = {
17 mermet.enable = true;
18 oignon.enable = true;
19 patate.enable = true;
20 carotte.enable = true;
21 aubergine.enable = true;
22 };
23 systemd.services."wireguard-${wgIface}" = {
24 unitConfig.Upholds = [ "upnpc-${toString wg.listenPort}.service" ];
25 };
26 networking.nftables.ruleset = ''
27 table inet filter {
28 chain input-intra {
29 tcp dport ssh counter accept comment "SSH"
30 udp dport 60000-61000 counter accept comment "Mosh"
31 }
32 chain output-intra {
33 tcp dport { ssh, 2222 } counter accept comment "SSH"
34 udp dport 60001-60010 counter accept comment "Mosh"
35 tcp dport { http, https } counter accept comment "HTTP"
36 tcp dport git counter accept comment "Git"
37 }
38 }
39 table inet nat {
40 chain postrouting {
41 iifname ${wgIface} oifname netIface masquerade
42 }
43 }
44 '';
45 # Apparently required to get NAT reflection.
46 services.upnpc.enable = true;
47 services.upnpc.redirections = [
48 {
49 description = "WireGuard";
50 externalPort = wg.listenPort;
51 protocol = "UDP";
52 duration = 30 * 60;
53 service.requiredBy = [ "wireguard-${wgIface}.service" ];
54 service.before = [ "wireguard-${wgIface}.service" ];
55 }
56 ];
57 boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
58
59 # Open a wireguard tunnel to a relay
60 # in case the host is hosted behind a NAT and has no SSH port forwarding.
61 # This enables to send the disk password to the initrd, like that:
62 # ssh -J mermet.sourcephile.fr root@losurdo.wg -p 2222
63 # TODO: use a dedicated interface wg-initrd
64 boot.initrd.secrets."/root/initrd/${wgIface}.key" = "/run/credentials/wireguard-${wgIface}.service/privateKey";
65 boot.initrd.kernelModules = [ "wireguard" ];
66 boot.initrd.extraUtilsCommands = ''
67 #copy_bin_and_libs ${pkgs.wireguard-tools}/bin/wg
68 cp -fpdv ${pkgs.wireguard-tools}/bin/.wg-wrapped $out/bin/wg
69 '';
70 boot.initrd.network.postCommands = ''
71 ip link add dev ${wgIface} type wireguard
72 ${lib.concatMapStringsSep "\n" (ip: ''
73 ip address add ${ip} dev ${wgIface}
74 '') wg.ips}
75 wg set ${wgIface} private-key /root/initrd/${wgIface}.key \
76 listen-port ${toString wg.listenPort}
77 ip link set up dev ${wgIface} mtu 1280
78 wg set ${wgIface} peer ${relay.peer.publicKey} \
79 endpoint ${relay.ipv4}:${toString relay.listenPort} \
80 allowed-ips ${relay.ipv4}/32 \
81 persistent-keepalive 5
82 ip route replace ${relay.ipv4}/32 dev ${wgIface} table main
83 '';
84 boot.initrd.postMountCommands = lib.mkIf initrd.network.flushBeforeStage2 ''
85 ip link del dev ${wgIface}
86 '';
87 }