76 lines
2 KiB
Nix
76 lines
2 KiB
Nix
{ lib, pkgs, config, ... }:
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let wg_port = 51820;
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in {
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boot.kernel.sysctl = {
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"net.ipv4.ip_forward" = lib.mkDefault true;
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"net.ipv6.conf.all.forwarding" = lib.mkDefault true;
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};
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# set up secret key
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sops = {
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age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
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secrets.private_key = {
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sopsFile = ../../secrets/wireguard/server.yaml;
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};
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};
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networking = {
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interfaces.wg0.ipv4.routes = [
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{
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address = "10.8.0.0";
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prefixLength = 16;
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}
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];
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# Enable NAT
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nat = {
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enable = true;
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enableIPv6 = true;
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externalInterface = "eth0";
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internalInterfaces = [ "wg0" ];
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};
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# Open ports in the firewall
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firewall = {
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allowedTCPPorts = [ 53 ];
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allowedUDPPorts = [ 53 wg_port ];
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};
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wg-quick.interfaces = {
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wg0 = {
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# Determines the IP address and subnet of the client's end of the tunnel interface.
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address = [ "10.8.0.1/32" ];
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listenPort = wg_port; # to match firewall allowedUDPPorts (without this wg uses random port numbers)
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# Path to the private key file (see sops).
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privateKeyFile = "/run/secrets/private_key";
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mtu = 1360;
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# This allows the wireguard server to route your traffic to the internet and hence be like a VPN
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postUp = ''
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${pkgs.iptables}/bin/iptables -A FORWARD -i wg0 -j ACCEPT
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${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.8.0.1/16 -o eth0 -j MASQUERADE
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${pkgs.iptables}/bin/ip6tables -A FORWARD -i wg0 -j ACCEPT
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'';
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# Undo the above
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preDown = ''
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${pkgs.iptables}/bin/iptables -D FORWARD -i wg0 -j ACCEPT
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${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.8.0.1/16 -o eth0 -j MASQUERADE
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${pkgs.iptables}/bin/ip6tables -D FORWARD -i wg0 -j ACCEPT
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'';
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peers = [
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{
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# Clara@nixpad
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publicKey = "msJJwTPHuxLd1KddbNeLscGgiY7r9sQ3vkUnDtb2Fh4=";
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allowedIPs = [ "10.8.0.2/32" ];
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}
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];
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};
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};
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};
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}
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