есть
debian gw0 squid eth0(lan) eth0:1(wan)
iptables -n -L -v --line-numbers
Chain INPUT (policy ACCEPT 554K packets, 32M bytes)
num pkts bytes target prot opt in out source destination
1 11M 9552M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
2 61 3996 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
3 94 7770 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0
4 9 592 ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
5 94228 7249K ACCEPT udp -- eth0 * 0.0.0.0/0 0.0.0.0/0 udp dpt:53
6 2 112 ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:53
7 6017 311K ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
Chain FORWARD (policy ACCEPT 194K packets, 12M bytes)
num pkts bytes target prot opt in out source destination
1 15 1140 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
Chain OUTPUT (policy ACCEPT 12M packets, 9793M bytes)
num pkts bytes target prot opt in out source destination
1 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:143
2 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:995
3 210 12555 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:53
4 192K 14M ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpt:53
acl Safe_ports port 1025-65535
tcpdump port 5080
14:53:36.637310 IP > 192.168.0.10.41540: Flags [.], ack 1013755, win 1582, options [nop,nop,TS val 4892264 ecr 20201615], length 0
14:53:36.638708 IP 5080 > 192.168.0.10.41540: Flags [.], ack 1016651, win 1817, options [nop,nop,TS val 4892264 ecr 20201615], length 0
14:53:36.639405 IP 5080 > 192.168.0.10.41540: Flags [.], ack 1019547, win 1943, options [nop,nop,TS val 4892264 ecr 20201615], length 0
14:53:36.639412 .5080 > 192.168.0.10.41540: Flags [.], ack 1022443, win 1943, options [nop,nop,TS val 4892264 ecr 20201615], length 0
14:53:36.639415 IP 5080 > 192.168.0.10.41540: Flags [.], ack 1025339, win 1943, options [nop,nop,TS val 4892265 ecr 20201615], length 0
14:53:36.639417 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1028235, win 1943, options [nop,nop,TS val 4892265 ecr 20201615], length 0
14:53:36.639419 .5080 > 192.168.0.10.41540: Flags [.], ack 1031131, win 1943, options [nop,nop,TS val 4892265 ecr 20201616], length 0
14:53:36.639421 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1034027, win 1943, options [nop,nop,TS val 4892265 ecr 20201616], length 0
14:53:36.639423 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1036923, win 1943, options [nop,nop,TS val 4892266 ecr 20201616], length 0
14:53:36.639608 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1039819, win 1943, options [nop,nop,TS val 4892266 ecr 20201616], length 0
14:53:36.639899 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1042715, win 1943, options [nop,nop,TS val 4892266 ecr 20201616], length 0
14:53:36.640145 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1045611, win 1943, options [nop,nop,TS val 4892266 ecr 20201616], length 0
14:53:36.640411 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1048507, win 1943, options [nop,nop,TS val 4892267 ecr 20201616], length 0
14:53:36.640524 IP .5080 > 192.168.0.10.41540: Flags [.], ack 1049530, win 1946, options [nop,nop,TS val 4892267 ecr 20201616], length 0