86 lines
1.9 KiB
Nix
86 lines
1.9 KiB
Nix
# Edit this configuration file to define what should be installed on
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# your system. Help is available in the configuration.nix(5) man page
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# and in the NixOS manual (accessible by running `nixos-help`).
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{ ... }:
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let
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# generate via openvpn --genkey --secret openvpn-laptop.key
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client-key = "/root/openvpn.key";
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domain = "vpn.xenia.me.uk";
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vpn-dev = "tun0";
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port = 1194;
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in {
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users.mutableUsers = false;
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system.autoUpgrade = {
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enable = true;
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flake = "git+https://git.xenia.me.uk/xenia/nixos.git?ref=main";
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dates = "02:30";
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allowReboot = true;
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rebootWindow = {
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lower = "02:00";
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upper = "05:00";
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};
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};
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networking = {
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nat = {
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enable = true;
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externalInterface = "enp42s0";
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internalInterfaces = [ vpn-dev ];
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};
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firewall = {
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trustedInterfaces = [ vpn-dev ];
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allowedUDPPorts = [ port ];
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};
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};
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services.openvpn = {
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restartAfterSleep = true;
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servers.xenia.config = ''
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dev ${vpn-dev}
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proto udp
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ifconfig 10.8.0.1 10.8.0.2
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secret ${client-key}
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port ${toString port}
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cipher AES-256-CBC
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auth-nocache
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comp-lzo
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keepalive 10 60
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ping-timer-rem
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persist-tun
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persist-key
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'';
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};
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environment.etc."openvpn/client.ovpn" = {
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text = ''
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dev tun
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remote "${domain}"
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ifconfig 10.8.0.2 10.8.0.1
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port ${toString port}
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redirect-gateway def1
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cipher AES-256-CBC
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auth-nocache
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comp-lzo
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keepalive 10 60
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resolv-retry infinite
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nobind
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persist-key
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persist-tun
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secret [inline]
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'';
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mode = "600";
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};
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system.activationScripts.openvpn-addkey = ''
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f="/etc/openvpn/client.ovpn"
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if ! grep -q '<secret>' $f; then
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echo "appending secret key"
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echo "<secret>" >> $f
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cat ${client-key} >> $f
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echo "</secret>" >> $f
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fi
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'';
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}
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