debian:/home/alvarez# iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.11:3128
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.22:3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.11:3128
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.22:3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.11:3128
DNAT       tcp  --  anywhere             anywhere            tcp dpt:www to:192.168.1.22:3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:www redir ports 3128

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
SNAT       0    --  anywhere             anywhere            MARK match 0x1 to:192.168.1.11
SNAT       0    --  anywhere             anywhere            MARK match 0x2 to:192.168.1.22

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
debian:/home/alvarez#