67 lines
2 KiB
Nix
67 lines
2 KiB
Nix
{ lib, pkgs, config, ... }:
|
|
let wg_port = 51820;
|
|
in {
|
|
boot.kernel.sysctl = {
|
|
"net.ipv4.ip_forward" = lib.mkDefault true;
|
|
"net.ipv6.conf.all.forwarding" = lib.mkDefault true;
|
|
};
|
|
|
|
# set up secret key
|
|
sops = {
|
|
age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
|
|
secrets.wg_private_key = {
|
|
sopsFile = ../../secrets/wireguard/cube.yaml;
|
|
};
|
|
};
|
|
|
|
networking = {
|
|
# Enable NAT
|
|
nat = {
|
|
enable = true;
|
|
enableIPv6 = true;
|
|
externalInterface = "eth0";
|
|
internalInterfaces = [ "wg0" ];
|
|
};
|
|
# Open ports in the firewall
|
|
firewall = {
|
|
rejectPackets = true;
|
|
trustedInterfaces = [ "wg0" ];
|
|
allowedTCPPorts = [ 53 ];
|
|
allowedUDPPorts = [ 53 wg_port ];
|
|
};
|
|
|
|
wg-quick.interfaces = {
|
|
wg0 = {
|
|
# Determines the IP address and subnet of the client's end of the tunnel interface.
|
|
address = [ "10.8.0.1/16" ];
|
|
listenPort = wg_port; # to match firewall allowedUDPPorts (without this wg uses random port numbers)
|
|
|
|
# Path to the private key file (see sops).
|
|
privateKeyFile = "/run/secrets/wg_private_key";
|
|
|
|
|
|
# This allows the wireguard server to route your traffic to the internet and hence be like a VPN
|
|
postUp = ''
|
|
${pkgs.iptables}/bin/iptables -A FORWARD -i wg0 -j ACCEPT
|
|
${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.8.1.1/24 -o eth0 -j MASQUERADE
|
|
'';
|
|
|
|
# Undo the above
|
|
preDown = ''
|
|
${pkgs.iptables}/bin/iptables -D FORWARD -i wg0 -j ACCEPT
|
|
${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.8.1.1/24 -o eth0 -j MASQUERADE
|
|
'';
|
|
|
|
peers = [
|
|
# List of allowed peers.
|
|
{
|
|
# Laptop Psi
|
|
publicKey = "msJJwTPHuxLd1KddbNeLscGgiY7r9sQ3vkUnDtb2Fh4=";
|
|
# List of IPs assigned to this peer within the tunnel subnet. Used to configure routing.
|
|
allowedIPs = [ "10.8.0.2/32" ];
|
|
}
|
|
];
|
|
};
|
|
};
|
|
};
|
|
}
|