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{ flakeRoot, ... }:
{
imports = [ (flakeRoot + /wireguard.nix) ];
networking = {
hostName = "sagittarius";
useNetworkd = true;
firewall.enable = false;
nftables = {
enable = true;
tables.filter = {
enable = true;
family = "inet";
content = ''
set temp-ports {
type inet_proto . inet_service
flags interval
comment "Temporarily opened ports"
}
chain rpfilter {
type filter hook prerouting priority mangle + 10; policy drop;
meta nfproto ipv4 udp sport . udp dport { 68 . 67, 67 . 68 } accept comment "DHCPv4 client/server"
fib saddr . mark . iif check exists accept
jump rpfilter-allow
}
chain rpfilter-allow {
}
chain prerouting {
type filter hook prerouting priority mangle;
iifname "wg0" meta mark set 42
}
chain input {
type filter hook input priority filter; policy drop;
iifname "lo" accept comment "trusted interfaces"
icmpv6 type echo-reply accept
ct state vmap { invalid : drop, established : accept, related : accept, new : jump input-allow, untracked : jump input-allow }
}
chain input-allow {
tcp dport { 22, 80, 443 } accept
udp dport 51820 accept
meta l4proto . th dport @temp-ports accept
icmp type echo-request accept comment "allow ping"
icmpv6 type != { nd-redirect, 139 } accept comment "Accept all ICMPv6 messages except redirects and node information queries (type 139). See RFC 4890, section 4.4."
ip6 daddr fe80::/64 udp dport 546 accept comment "DHCPv6 client"
iifname "wg0" udp dport 53 accept comment "allow DNS over wireguard"
}
'';
};
};
};
systemd.network = {
enable = true;
networks = {
"10-wan" = {
matchConfig.Name = "enp1s0";
networkConfig.DHCP = "ipv4";
address = [ "2a01:4f9:c012:c7a7::1/64" ];
routes = [ { Gateway = "fe80::1"; } ];
};
};
};
}
|
