iptables -t nat -L -v
Chain PREROUTING (policy ACCEPT 7106 packets, 1520K bytes)
 pkts bytes target     prot opt in     out     source               destination
 1210  259K nova-api-metadat-PREROUTING  all  --  any    any     anywhere             anywhere

Chain POSTROUTING (policy ACCEPT 23 packets, 1680 bytes)
 pkts bytes target     prot opt in     out     source               destination
    6   360 nova-api-metadat-POSTROUTING  all  --  any    any     anywhere             anywhere
   23  1680 nova-postrouting-bottom  all  --  any    any     anywhere             anywhere

Chain OUTPUT (policy ACCEPT 23 packets, 1680 bytes)
 pkts bytes target     prot opt in     out     source               destination
    6   360 nova-api-metadat-OUTPUT  all  --  any    any     anywhere             anywhere

Chain nova-api-metadat-OUTPUT (1 references)
 pkts bytes target     prot opt in     out     source               destination

Chain nova-api-metadat-POSTROUTING (1 references)
 pkts bytes target     prot opt in     out     source               destination

Chain nova-api-metadat-PREROUTING (1 references)
 pkts bytes target     prot opt in     out     source               destination

Chain nova-api-metadat-float-snat (1 references)
 pkts bytes target     prot opt in     out     source               destination

Chain nova-api-metadat-snat (1 references)
 pkts bytes target     prot opt in     out     source               destination
    6   360 nova-api-metadat-float-snat  all  --  any    any     anywhere             anywhere

Chain nova-postrouting-bottom (1 references)
 pkts bytes target     prot opt in     out     source               destination
    6   360 nova-api-metadat-snat  all  --  any    any     anywhere             anywhere