Chain PREROUTING (policy ACCEPT 1131 packets, 133390 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
     842    45148 NEW        tcp  --  any    any     anywhere             anywhere            state NEW 
    1144   134170 prerouting_rule  all  --  any    any     anywhere             anywhere            
      40     3262 prerouting_wan  all  --  ppp0   any     anywhere             anywhere            

Chain POSTROUTING (policy ACCEPT 9 packets, 813 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
     842    45298 postrouting_rule  all  --  any    any     anywhere             anywhere            
     833    44485 MASQUERADE  all  --  any    ppp0    anywhere             anywhere            

Chain OUTPUT (policy ACCEPT 5 packets, 570 bytes)
    pkts      bytes target     prot opt in     out     source               destination         

Chain NEW (1 references)
    pkts      bytes target     prot opt in     out     source               destination         
     842    45148 RETURN     all  --  any    any     anywhere             anywhere            limit: avg 50/sec burst 100 
       0        0 DROP       all  --  any    any     anywhere             anywhere            

Chain postrouting_rule (1 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain prerouting_rule (1 references)
    pkts      bytes target     prot opt in     out     source               destination         
       0        0 DNAT       udp  --  ppp0   any     anywhere             anywhere            udp dpt:22 to:10.0.0.51 
       6      360 DNAT       tcp  --  ppp0   any     anywhere             anywhere            tcp dpt:22 to:10.0.0.51 

Chain prerouting_wan (1 references)
    pkts      bytes target     prot opt in     out     source               destination         
       0        0 DNAT       udp  --  any    any     anywhere             anywhere            udp dpt:2222 to:10.0.0.21:22 
       7      420 DNAT       tcp  --  any    any     anywhere             anywhere            tcp dpt:2222 to:10.0.0.21:22 
root@hydrogen:~#