Something

mike@mlab:~$ sudo iptables -t nat -L -n -v
Chain PREROUTING (policy ACCEPT 26 packets, 1827 bytes)
 pkts bytes target     prot opt in     out     source               destination 
   26  1827 gforward   all  --  *      *       0.0.0.0/0            0.0.0.0/0   

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination 
    0     0 MASQUERADE  all  --  *      *       0.0.0.0/0            0.0.0.0/0           MARK match 0x1
   36  2243 fromprivate  all  --  *      *       192.168.0.0/16       0.0.0.0/0 
    0     0 fromprivate  all  --  *      *       172.16.0.0/12        0.0.0.0/0 
    0     0 fromprivate  all  --  *      *       10.0.0.0/8           0.0.0.0/0 

Chain OUTPUT (policy ACCEPT 19 packets, 1146 bytes)
 pkts bytes target     prot opt in     out     source               destination 
   19  1146 gforward   all  --  *      *       0.0.0.0/0            0.0.0.0/0   

Chain fromprivate (3 references)
 pkts bytes target     prot opt in     out     source               destination 
   24  1523 ACCEPT     all  --  *      *       0.0.0.0/0            192.168.0.0/16
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            172.16.0.0/12
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            10.0.0.0/8  
   12   720 MASQUERADE  all  --  *      *       0.0.0.0/0            0.0.0.0/0  

Chain ftolocal (3 references)
 pkts bytes target     prot opt in     out     source               destination 

Chain gforward (2 references)
 pkts bytes target     prot opt in     out     source               destination 
    0     0 ftolocal   all  --  *      *       0.0.0.0/0            192.168.1.12
    0     0 ftolocal   all  --  *      *       0.0.0.0/0            127.0.0.1   
    7   588 ftolocal   all  --  *      *       0.0.0.0/0            192.168.1.99