define netif = enp0s3 define dmzif = enp0s8 define lanif = enp0s9 table ip ipfilter { chain routing { type filter hook forward priority filter; policy accept; icmp type echo-request iif { "$netif", "$dmzif" } drop icmp type { echo-reply, echo-request } accept drop } chain system_in { type filter hook input priority filter; policy accept; icmp type echo-request iif { "$netif", "$dmzif" } drop } }