Stuff

hierro:~# iptables -t nat -L -n -v
Chain PREROUTING (policy ACCEPT 31609 packets, 4175K bytes)
 pkts bytes target     prot opt in     out     source               destination
   13   544 DNAT       tcp  --  eth1   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:5432 to:10.0.1.5:5432

Chain POSTROUTING (policy ACCEPT 161 packets, 10066 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 MASQUERADE  0    --  *      *       10.0.1.0/24          0.0.0.0/0

Chain OUTPUT (policy ACCEPT 115 packets, 7939 bytes)
 pkts bytes target     prot opt in     out     source               destination
hierro:~#

]
hierro:~# iptables -t filter -L -n -v
Chain INPUT (policy ACCEPT 9744 packets, 2363K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
   44  1832 ACCEPT     tcp  --  eth1   eth0    0.0.0.0/0            0.0.0.0/0           tcp dpt:5432 state NEW,RELATED,ESTABLISHED

Chain OUTPUT (policy ACCEPT 9176 packets, 555K bytes)
 pkts bytes target     prot opt in     out     source               destination
hierro:~#