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{ lib, pkgs, ... }:
/*
Wireguard VPN server
References:
- https://nixos.wiki/wiki/WireGuard
- https://wireguard.how/client/ios/
*/
let
ports = import ../Cloud/Ports.nix;
ips = "10.100.0.1/24";
# a micro-library for creating iptables rules
iptables = rec {
bin = "${pkgs.iptables/bin/iptables}";
append = {source}: lib.concatSep " " [
bin
"--table" "nat"
"--append" "POSTROUTING"
"--source" source
"--out-interface" "eth0"
"--jump" "MASQUERADE"
];
delete = {source}: lib.concatSep " " [
bin
"--table" "nat"
"--delete" "POSTROUTING"
"--source" source
"--out-interface" "eth0"
"--jump" "MASQUERADE"
];
};
in {
networking.nat.enable = true;
networking.nat.externalInterface = "eth0";
networking.nat.internalInterfaces = [ "wg0" ];
networking.firewall.allowedUDPPorts = [ ports.wireguard ];
networking.wireguard-tools.enable = true;
networking.wireguard-tools.interfaces = {
wg0 = {
ips = [ ips ];
allowedIPsAsRoutes = true;
listenPort = ports.wireguard;
postSetup = ''
${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s ${ips} -o eth0 -j MASQUERADE
'';
postShutdown = ''
${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s ${ips} -o eth0 -j MASQUERADE
'';
privateKeyFile = "/var/wireguard/private";
peers = [
#{ # helium
# publicKey = "";
# allowedIPs = [ "10.100.0.2/32" ];
#}
{ # ben's iPhone
publicKey = "SIBIfPLhzuV1S1FZtm5JQtDbl0ehnH+Y3CpoZ2eZ3gc=";
allowedIPs = [ "10.100.0.3/32" ];
}
];
};
};
}
|
