Te adjuntamos aqui el propio Firewall entero y lo que nos aparece con "iptables -nvL" te lo escribimos aqui:
UE-206-06:~/Desktop # iptables -nvL
Chain INPUT (policy ACCEPT 4600 packets, 3786K bytes)
pkts bytes target prot opt in out source destination
66 3452 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT tcp -- eth2 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
0 0 ACCEPT icmp -- eth1 * 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT icmp -- eth0 * 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT icmp -- eth2 * 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
Chain FORWARD (policy ACCEPT 405 packets, 82664 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT icmp -- eth1 eth2 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT icmp -- eth2 eth1 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT icmp -- eth1 eth0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT icmp -- eth0 eth1 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT icmp -- eth0 eth2 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT icmp -- eth2 eth0 0.0.0.0/0 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT icmp -- * * 192.168.100.0/22 192.168.108.0/26
0 0 ACCEPT icmp -- * * 192.168.108.0/26 192.168.100.0/22 state RELATED
,ESTABLISHED
0 0 ACCEPT all -- * * 0.0.0.0/0 192.168.200.0/24
0 0 ACCEPT all -- * * 192.168.200.0/24 0.0.0.0/0 state RELATED
,ESTABLISHED
0 0 ACCEPT tcp -- eth1 eth0 0.0.0.0/0 0.0.0.0/0 multiport dpo
rts 88,135,137,138,139,389,445,749
0 0 ACCEPT tcp -- eth0 eth1 0.0.0.0/0 0.0.0.0/0 multiport spo
rts 88,135,137,138,139,389,445,749
0 0 ACCEPT udp -- eth1 eth0 0.0.0.0/0 0.0.0.0/0 multiport dpo rts 88,135,137,138,139,389,445,749
0 0 ACCEPT udp -- eth0 eth1 0.0.0.0/0 0.0.0.0/0 multiport spo rts 88,135,137,138,139,389,445,749
257 19784 ACCEPT udp -- * eth2 192.168.100.193 0.0.0.0/0
251 33129 ACCEPT udp -- eth2 * 0.0.0.0/0 192.168.100.193 state RELATED ,ESTABLISHED
0 0 ACCEPT udp -- eth1 eth0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT udp -- eth0 eth1 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT tcp -- * * 0.0.0.0/0 192.168.100.195 tcp dpt:80
0 0 ACCEPT tcp -- * * 192.168.100.195 0.0.0.0/0 tcp spt:80
0 0 ACCEPT tcp -- eth1 eth2 0.0.0.0/0 0.0.0.0/0 state NEW,REL ATED,ESTABLISHED tcp dpt:80
0 0 ACCEPT tcp -- eth2 eth1 0.0.0.0/0 0.0.0.0/0 state RELATED ,ESTABLISHED tcp spt:80
0 0 ACCEPT tcp -- eth1 eth2 0.0.0.0/0 0.0.0.0/0 state NEW,REL ATED,ESTABLISHED tcp dpt:443
0 0 ACCEPT tcp -- eth2 eth1 0.0.0.0/0 0.0.0.0/0 state RELATED ,ESTABLISHED tcp spt:443
Chain OUTPUT (policy ACCEPT 3594 packets, 507K bytes)
pkts bytes target prot opt in out source destination
66 3452 ACCEPT all -- * lo 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT tcp -- * eth2 0.0.0.0/0 0.0.0.0/0 tcp spt:22
0 0 ACCEPT icmp -- * eth1 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT icmp -- * eth0 0.0.0.0/0 0.0.0.0/0
1 68 ACCEPT icmp -- * eth2 0.0.0.0/0 0.0.0.0/0