# iptables --table nat -L -v
Chain PREROUTING (policy ACCEPT 18 packets, 1056 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 17 packets, 1569 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain POSTROUTING (policy ACCEPT 4 packets, 508 bytes)
 pkts bytes target     prot opt in     out     source               destination         
   31  2117 MASQUERADE  all  --  any    usb0    anywhere             anywhere