114 lines
3.5 KiB
Nix
114 lines
3.5 KiB
Nix
{ config, lib, pkgs, gcSecrets, ... }:
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let
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port = 51820;
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serverName = "dandelion";
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serverInterface = "enp0s6";
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serverIp = gcSecrets.wireguard.gateway;
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forwarding = {
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# "22727" = [ "10.100.0.3" "7777" ];
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};
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mapForwards = type:
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builtins.concatStringsSep "\n" (
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lib.mapAttrsToList (sport: tuple:
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let
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dest = builtins.head tuple;
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dport = lib.last tuple;
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in ''
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${pkgs.iptables}/bin/iptables -${type} PREROUTING -t nat -i ${serverInterface} -p tcp --dport ${sport} -j DNAT --to ${dest}:${dport}
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${pkgs.iptables}/bin/iptables -${type} FORWARD -p tcp -d ${dest} --dport ${dport} -j ACCEPT
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'') forwarding
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);
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clients = {
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hyacinth = {
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publicKey = "6nVhazYdmC15A/nke9VrqIg3sOBVOmqj4GEsyBq7MVo=";
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allowedIPs = [ "10.100.0.3/32" "${gcSecrets.wireguard.ipv6Subnet}:3" "fd0d::3" ];
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};
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anemone = {
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publicKey = "px5+JNdAmqBvUC++DhiJrUBRAr+BYP6iYVt4sbhPTWY=";
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allowedIPs = [ "10.100.0.4/32" "${gcSecrets.wireguard.ipv6Subnet}:4" "fd0d::4" ];
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};
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hibiscus = {
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publicKey = "vQ5a2KMrwi7RCRsD0yvog+n35vQYFuvwiPn+W4lbRBw=";
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allowedIPs = [ "10.100.0.5/32" "${gcSecrets.wireguard.ipv6Subnet}:5" "fd0d::5" ];
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};
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};
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clientPeers = builtins.attrValues clients;
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serverPeer = {
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publicKey = "3ugIk2tQZXjAH9/95s63ld2WNUHQrd4Mz5jzbln6oj0=";
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allowedIPs = [ "0.0.0.0/0" "::/0" ];
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endpoint = "${serverIp}:${toString port}";
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persistentKeepalive = 25;
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};
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server6OnlyPeer = {
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publicKey = "3ugIk2tQZXjAH9/95s63ld2WNUHQrd4Mz5jzbln6oj0=";
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allowedIPs = [ "::/0" ];
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endpoint = "${serverIp}:${toString port}";
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persistentKeepalive = 25;
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};
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serverConfig = {
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nat = {
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enable = true;
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externalInterface = serverInterface;
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internalInterfaces = [ "wg0" ];
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};
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firewall = {
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allowedTCPPorts = (builtins.map (s: lib.strings.toInt s) (builtins.attrNames forwarding));
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allowedUDPPorts = [ port ];
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};
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wireguard.interfaces.wg0 = {
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ips = [ "10.100.0.1/24" "${gcSecrets.wireguard.ipv6Subnet}:1" "fd0d::1" ];
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listenPort = port;
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postSetup = ''
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${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.100.0.0/24 -o ${serverInterface} -j MASQUERADE
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${mapForwards "A"}
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'';
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postShutdown = ''
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${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.100.0.0/24 -o ${serverInterface} -j MASQUERADE
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${mapForwards "D"}
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'';
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privateKeyFile = config.age.secrets."wg_${serverName}".path;
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peers = clientPeers;
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};
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};
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clientConfig = {
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wg-quick.interfaces =
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let
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client = clients."${config.networking.hostName}";
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in {
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wg0 = {
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address = client.allowedIPs;
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dns = [ "fd0d::1" "10.100.0.1" ];
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privateKeyFile = config.age.secrets."wg_${config.networking.hostName}".path;
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peers = [ server6OnlyPeer ];
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};
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wg1 = {
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address = client.allowedIPs;
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dns = [ "fd0d::1" "10.100.0.1" ];
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privateKeyFile = config.age.secrets."wg_${config.networking.hostName}".path;
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peers = [ serverPeer ];
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autostart = false;
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};
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};
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};
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in {
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boot.kernel.sysctl = lib.mkIf (config.networking.hostName == serverName) ({
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"net.ipv6.conf.all.forwarding" = true;
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"net.ipv6.conf.default.forwarding" = true;
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});
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networking =
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lib.mkMerge [
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(lib.mkIf (config.networking.hostName == serverName) serverConfig)
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(lib.mkIf (builtins.hasAttr config.networking.hostName clients) clientConfig)
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];
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}
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