Here's the output from iptables
[root@squid ~]# iptables -t mangle -L
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DIVERT tcp -- anywhere anywhere socket
TPROXY tcp -- anywhere anywhere tcp
dpt:http TPROXY redirect 0.0.0.0:3129 mark 0x1/0x1
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
Chain DIVERT (1 references)
target prot opt source destination
MARK all -- anywhere anywhere MARK xset
0x1/0xffffffff
ACCEPT all -- anywhere anywhere
