Files
fwl/examples/simple-router.fwl
2026-05-04 03:16:40 -07:00

38 lines
1.1 KiB
Plaintext

interface wan : WAN { dynamic; };
interface lan : LAN { cidr4 = { 10.0.0.0/24 }; };
zone lan_zone = { lan };
let rfc1918 : Set<IPv4> = { 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 };
let open_ports : Set<Port> = { :22 };
let forwards_v6 : Set<(Protocol, IPv6, Port)> = {
(tcp, 2001:db8::1, :22000)
};
portforward wan_forwards
on wan
via Map<(Protocol, Port), (IPv4, Port)> = {
(tcp, :8080) -> (10.0.0.10, :80)
};
masquerade wan_snat
on wan
src rfc1918;
policy input : Frame hook Input = {
| Frame(_, IPv4(_, TCP(tcp, _)))
if tcp.dport in open_ports -> Allow;
| Frame(_, IPv4(_, UDP(udp, _)))
if udp.dport == :51944 -> Allow;
| _ -> Drop;
};
policy forward : Frame hook Forward = {
| Frame(iif in lan_zone -> wan, _) -> Allow;
| Frame(wan -> iif in lan_zone, IPv6(ip6, TCP(th, _) | UDP(th, _)))
if (ip6.protocol, ip6.dst, th.dport) in forwards_v6 -> Allow;
| _ -> Drop;
};