define netif = enp0s3
define lanif = enp0s8
define dmzif = enp0s9
 
define netip = 192.168.0.140
define iplan = 172.16.0.254
define ipdmz = 172.17.0.254

define lan-ntw = 172.16.0.1-172.16.0.254
define dmz-ntw = 172.17.0.1-172.17.0.254

table ip ipfilter {
        chain prerouting {
                type filter hook prerouting priority filter; policy drop;
		tcp dport 22 accept
                icmp type echo-request iif $lanif accept
                icmp type echo-reply iif {$lanif, $dmzif} accept
        }
	chain system_in {
                type filter hook input priority filter; policy drop;
		tcp dport 22 accept
                icmp type echo-request iif $lanif accept
                icmp type echo-reply accept
        }
 	chain routing {
                type filter hook forward priority filter; policy drop;
                icmp type echo-request iif $lanif oif $dmzif accept
                icmp type echo-reply iif $dmzif oif $lanif accept
        }
 	chain system_out {
                type filter hook output priority filter; policy drop;
		tcp sport 22 accept
                icmp type echo-request  accept
                icmp type echo-reply oif $lanif accept
        }
	chain postrouting {
                type filter hook postrouting priority filter; policy drop;
		tcp sport 22 accept
                icmp type echo-request oif {$lanif, $dmzif} accept
                icmp type echo-reply oif $lanif accept
        }
}