Данный шлюз используется по умолчанию всеми тачками сети
интерфейс eth0 смотрит в интернет а eth1 внутрь локалкина iptables -nvL --line получино:
Chain INPUT (policy DROP 13591 packets, 1232K bytes)
num pkts bytes target prot opt in out source destina tion
1 235K 39M bad_tcp_packets tcp -- * * 0.0.0.0/0 0 .0.0.0/0
2 227K 28M ACCEPT all -- * * 192.168.200.0/24 0.0.0.0 /0
3 2 120 ACCEPT all -- * * 192.168.0.0/16 0.0.0.0 /0
4 5 393 ACCEPT all -- * * 0.0.0.0/0 127.0.0 .1
5 173K 34M ACCEPT all -- * * 0.0.0.0/0 62.148. 255.222 state RELATED,ESTABLISHED
6 15M 3464M ACCEPT all -- * * 0.0.0.0/0 10.8.0. 178 state RELATED,ESTABLISHED
7 0 0 ACCEPT all -- * * 0.0.0.0/0 192.168 .200.10 state RELATED,ESTABLISHED
8 1466 80947 icmp_packets icmp -- eth0 * 0.0.0.0/0 0.0. 0.0/0
9 12016 665K tcp_packets tcp -- eth0 * 0.0.0.0/0 0.0.0 .0/0
10 956 325K udp_packets udp -- eth0 * 0.0.0.0/0 0.0.0 .0/0
11 0 0 icmp_packets icmp -- tun1 * 0.0.0.0/0 0.0. 0.0/0
12 0 0 tcp_packets tcp -- tun1 * 0.0.0.0/0 0.0.0 .0/0
13 0 0 udp_packets udp -- tun1 * 0.0.0.0/0 0.0.0 .0/0
14 0 0 icmp_packets icmp -- eth1 * 0.0.0.0/0 0.0. 0.0/0
15 0 0 tcp_packets tcp -- eth1 * 0.0.0.0/0 0.0.0 .0/0
16 141 48559 udp_packets udp -- eth1 * 0.0.0.0/0 0.0.0 .0/0
17 6079 618K LOG all -- * * 0.0.0.0/0 0.0.0.0 /0 limit: avg 3/min burst 3 LOG flags 0 level 7 prefix `IPT INPUT pack et died: '
Chain FORWARD (policy DROP 370 packets, 17918 bytes)
num pkts bytes target prot opt in out source destina tion
1 28M 5583M bad_tcp_packets tcp -- * * 0.0.0.0/0 0 .0.0.0/0
2 42137 2362K ACCEPT icmp -- * * 192.168.200.0/24 0.0.0.0 /0
3 2974K 526M ACCEPT all -- * * 192.168.200.0/27 0.0.0.0 /0
4 24M 3780M ACCEPT all -- * * 192.168.0.0/16 192.168 .0.0/16
5 70210 3171K ACCEPT tcp -- * * 192.168.200.0/24 0.0.0.0 /0 tcp dpt:110
6 0 0 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0 /0 udp dpt:110
7 73940 100M ACCEPT tcp -- * * 192.168.200.0/24 0.0.0.0 /0 tcp dpt:25
8 0 0 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0 /0 udp dpt:25
9 386 27457 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0 /0 udp dpt:53
10 7194 345K DROP tcp -- * * 192.168.200.0/24 0.0.0.0 /0 tcp dpt:80
11 81 3888 DROP tcp -- * * 192.168.200.0/24 0.0.0.0 /0 tcp dpt:21
12 53 2872 ACCEPT tcp -- * * 0.0.0.0/0 192.168 .200.1 tcp dpt:4899
13 0 0 ACCEPT tcp -- * * 0.0.0.0/0 192.168 .200.1 tcp dpt:5001
14 1420K 1226M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0 /0 state RELATED,ESTABLISHED
15 24 1275 LOG all -- * * 0.0.0.0/0 0.0.0.0 /0 limit: avg 3/min burst 3 LOG flags 0 level 7 prefix `IPT FORWARD pa cket died: '
16 0 0 ACCEPT tcp -- eth0 * 0.0.0.0/0 192.168 .200.1 tcp dpt:4899
Chain OUTPUT (policy DROP 411 packets, 16440 bytes)
num pkts bytes target prot opt in out source destina tion
1 276K 49M bad_tcp_packets tcp -- * * 0.0.0.0/0 0 .0.0.0/0
2 5 393 ACCEPT all -- * * 127.0.0.1 0.0.0.0 /0
3 123K 35M ACCEPT all -- * * 192.168.200.10 0.0.0.0 /0
4 226K 24M ACCEPT all -- * * 62.148.255.222 0.0.0.0 /0
5 10M 1168M ACCEPT all -- * * 10.8.0.178 0.0.0.0 /0
6 320 12800 LOG all -- * * 0.0.0.0/0 0.0.0.0 /0 limit: avg 3/min burst 3 LOG flags 0 level 7 prefix `IPT OUTPUT pac ket died: '
Chain allowed (2 references)
num pkts bytes target prot opt in out source destina tion
1 7113 427K ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp flags:0x16/0x02
2 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0 /0 state RELATED,ESTABLISHED
3 0 0 DROP tcp -- * * 0.0.0.0/0 0.0.0.0 /0
Chain bad_tcp_packets (3 references)
num pkts bytes target prot opt in out source destina tion
1 454 21560 REJECT tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp flags:0x12/0x12 state NEW reject-with tcp-reset
2 2327 1191K LOG tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp flags:!0x16/0x02 state NEW LOG flags 0 level 4 prefix `New not syn:'
3 2327 1191K DROP tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp flags:!0x16/0x02 state NEW
Chain icmp_packets (3 references)
num pkts bytes target prot opt in out source destina tion
1 1463 80779 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0 /0 icmp type 8
2 3 168 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0 /0 icmp type 11
Chain tcp_packets (3 references)
num pkts bytes target prot opt in out source destina tion
1 7113 427K allowed tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp dpt:22
2 0 0 allowed tcp -- * * 0.0.0.0/0 0.0.0.0 /0 tcp dpt:5001
Chain udp_packets (3 references)
num pkts bytes target prot opt in out source destina tion
1 0 0 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0 /0 udp dpt:53
на iptables -nvL FORWARD --line
num pkts bytes target prot opt in out source destination
1 28M 5584M bad_tcp_packets tcp -- * * 0.0.0.0/0 0.0.0.0/0
2 42137 2362K ACCEPT icmp -- * * 192.168.200.0/24 0.0.0.0/0
3 2974K 526M ACCEPT all -- * * 192.168.200.0/27 0.0.0.0/0
4 24M 3781M ACCEPT all -- * * 192.168.0.0/16 192.168.0.0/16
5 70218 3171K ACCEPT tcp -- * * 192.168.200.0/24 0.0.0.0/0 tcp dpt:110
6 0 0 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0/0 udp dpt:110
7 73940 100M ACCEPT tcp -- * * 192.168.200.0/24 0.0.0.0/0 tcp dpt:25
8 0 0 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0/0 udp dpt:25
9 386 27457 ACCEPT udp -- * * 192.168.200.0/24 0.0.0.0/0 udp dpt:53
10 7194 345K DROP tcp -- * * 192.168.200.0/24 0.0.0.0/0 tcp dpt:80
11 81 3888 DROP tcp -- * * 192.168.200.0/24 0.0.0.0/0 tcp dpt:21
12 53 2872 ACCEPT tcp -- * * 0.0.0.0/0 192.168.200.1 tcp dpt:4899
13 0 0 ACCEPT tcp -- * * 0.0.0.0/0 192.168.200.1 tcp dpt:5001
14 1420K 1226M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
15 24 1275 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 limit: avg 3/min burst 3 LOG flags 0 level 7 prefix `IPT FORWARD packet died: '
16 0 0 ACCEPT tcp -- eth0 * 0.0.0.0/0 192.168.200.1 tcp dpt:4899
iptables -t nat -nvL --line
Chain PREROUTING (policy ACCEPT 233K packets, 21M bytes)
num pkts bytes target prot opt in out source destina tion
1 6 288 DNAT tcp -- eth0 * 0.0.0.0/0 62.148. 255.222 tcp dpt:5001 to:192.168.200.1:4899
2 5 240 DNAT tcp -- * * 0.0.0.0/0 62.128. 255.222 tcp dpt:5000 to:192.168.200.1:4899
3 0 0 DNAT tcp -- * * 0.0.0.0/0 62.128. 255.222 tcp dpt:5000 to:192.168.200.1:4899
Chain POSTROUTING (policy ACCEPT 89333 packets, 6429K bytes)
num pkts bytes target prot opt in out source destina tion
1 96819 6925K SNAT all -- * eth0 192.168.200.0/24 0.0.0.0 /0 to:$EXT_R_IP
2 0 0 ULOG all -- * eth0 192.168.200.0/24 0.0.0.0 /0 ULOG copy_range 0 nlgroup 1 queue_threshold 1
3 4 192 MASQUERADE tcp -- * * 0.0.0.0/0 192.16 8.200.1 tcp dpt:4899