user@proxy:~$ ip -s link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
RX: bytes packets errors dropped overrun mcast
134851 1140 0 0 0 0
TX: bytes packets errors dropped carrier collsns
134851 1140 0 0 0 0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1d:92:69:fe:70 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
1969234679 15424226 0 1265 0 0
TX: bytes packets errors dropped carrier collsns
24453690762 20953066 0 0 0 0
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
link/ether 00:e0:53:0b:10:dd brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
22114358919 18147873 34 1225 0 0
TX: bytes packets errors dropped carrier collsns
1632480496 11423177 0 0 0 0
user@proxy:~$ sudo iptables-save
[sudo] password for user:
# Generated by iptables-save v1.4.12 on Wed Jul 9 12:25:28 2014
*filter
:INPUT ACCEPT [32159240:23125512538]
:FORWARD ACCEPT [654188:366360382]
:OUTPUT ACCEPT [31659731:25252444134]
-A FORWARD -s 192.168.0.0/24 ! -d 192.168.0.0/24 -p tcp -m multiport --dports 25,110,465,995 -j ACCEPT
COMMIT
# Completed on Wed Jul 9 12:25:28 2014
# Generated by iptables-save v1.4.12 on Wed Jul 9 12:25:28 2014
*nat
:PREROUTING ACCEPT [803586:48865045]
:INPUT ACCEPT [748356:41614575]
:OUTPUT ACCEPT [302718:18181795]
:POSTROUTING ACCEPT [8:4477]
-A POSTROUTING -o eth1 -j SNAT --to-source 192.168.1.205
COMMIT
# Completed on Wed Jul 9 12:25:28 2014