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modules/wg-clerie: select VPN endpoint based on IP protocol availability

This commit is contained in:
clerie 2023-07-25 21:31:22 +02:00
parent c02a5af8d5
commit ddbc04dfd2
1 changed files with 26 additions and 9 deletions
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35
modules/wg-clerie/default.nix
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@ -36,14 +36,30 @@ in
petabyte.policyrouting = {
enable = true;
rules6 = concatMap (ip: [
{ rule = "from ${ip} lookup wg-clerie"; prio = 20000; }
{ rule = "from ${ip} unreachable"; prio = 20001; }
]) cfg.ipv6s;
rules4 = concatMap (ip: [
{ rule = "from ${ip} lookup wg-clerie"; prio = 20000; }
{ rule = "from ${ip} unreachable"; prio = 20001; }
]) cfg.ipv4s;
rules6 = (concatMap (ip: [
{ rule = "from ${ip} lookup wg-clerie"; prio = 19000; }
{ rule = "from ${ip} unreachable"; prio = 19001; }
]) cfg.ipv6s) ++ [
# Do not reach VPN server via VPN
{ rule = "to 2a01:4f8:c0c:15f1::1/128 ipproto udp dport 51820 lookup main"; prio = 20000; }
{ rule = "to 2a01:4f8:c0c:15f1::1/128 ipproto udp dport 51820 unreachable"; prio = 20001; }
# Try direct routing first, fallback to VPN
{ rule = "lookup main"; prio = 21000; }
{ rule = "lookup wg-clerie"; prio = 21001; }
{ rule = "unreachable"; prio = 22000; }
];
rules4 = (concatMap (ip: [
{ rule = "from ${ip} lookup wg-clerie"; prio = 19000; }
{ rule = "from ${ip} unreachable"; prio = 19001; }
]) cfg.ipv4s) ++ [
# Do not reach VPN server via VPN
{ rule = "to 78.47.183.82/32 ipproto udp dport 51820 lookup main"; prio = 20000; }
{ rule = "to 78.47.183.82/32 ipproto udp dport 51820 unreachable"; prio = 20001; }
# Try direct routing first, fallback to VPN
{ rule = "lookup main"; prio = 21000; }
{ rule = "lookup wg-clerie"; prio = 21001; }
{ rule = "unreachable"; prio = 22000; }
];
};
networking.wireguard.enable = true;
@ -54,7 +70,8 @@ in
table = "wg-clerie";
peers = [
{
endpoint = "vpn.clerie.de:51820";
# Fallback to legacy IP if there is no route to VPN server
endpoint = "$(ip route get 2a01:4f8:c0c:15f1::1 ipproto udp dport 51820 &>/dev/null && echo '[2a01:4f8:c0c:15f1::1]:51820' || echo '78.47.183.82:51820')";
persistentKeepalive = 25;
dynamicEndpointRefreshSeconds = 5;
allowedIPs = [ "0.0.0.0/0" "::/0" "10.20.30.0/24" "2a01:4f8:c0c:15f1::/113" ];