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| define netif = enp0s3 | ||||
| define dmzif = enp0s8 | ||||
| define lanif = enp0s9 | ||||
|  | ||||
| define firewall = 192.168.0.120 | ||||
| define ipdmz = 172.16.0.254 | ||||
| define iplan = 10.0.0.254 | ||||
|  | ||||
| table ip ipfilter{ | ||||
| 	chain prerouting { | ||||
|                 type filter hook prerouting priority filter; policy drop; | ||||
| 		icmp type echo-reply accept | ||||
| 		ct state established, related accept | ||||
| 		icmp type echo-request iif {$lanif} ip daddr 172.16.0.1-172.16.0.254 accept | ||||
| 		icmp type echo-request iif {$lanif} ip daddr {$iplan} accept | ||||
| 		tcp dport 22 accept | ||||
|         } | ||||
| 	chain system_in { | ||||
|                 type filter hook input priority filter; policy drop; | ||||
| 		icmp type echo-reply accept | ||||
| 		icmp type echo-request iif {$lanif} accept | ||||
| 		ct state established, related accept | ||||
|                 tcp dport 22 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; | ||||
| 		icmp type echo-reply oif {$lanif} accept | ||||
| 		icmp type echo-request accept | ||||
| 		ip daddr 10.121.38.7-10.121.38.8 accept | ||||
| 		tcp sport 22 accept | ||||
|         } | ||||
| 	chain postrouting { | ||||
|                 type filter hook postrouting priority filter; policy drop; | ||||
| 		ip daddr 10.121.38.7-10.121.38.8 accept | ||||
| 		icmp type echo-request ip saddr {$iplan, $ipdmz, $firewall} accept | ||||
| 		icmp type echo-reply iif {$dmzif}  oif {$lanif} accept | ||||
| 		icmp type echo-request iif {$lanif} oif {$dmzif} accept | ||||
| 		icmp type echo-request ip saddr $iplan oif $lanif accept | ||||
| 		tcp sport 22 accept | ||||
|         } | ||||
| } | ||||
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