iptables -t nat -S
-P PREROUTING ACCEPT
-P POSTROUTING ACCEPT
-P OUTPUT ACCEPT
-N nova-api-metadat-OUTPUT
-N nova-api-metadat-POSTROUTING
-N nova-api-metadat-PREROUTING
-N nova-api-metadat-float-snat
-N nova-api-metadat-snat
-N nova-postrouting-bottom
-A PREROUTING -j nova-api-metadat-PREROUTING
-A POSTROUTING -j nova-api-metadat-POSTROUTING
-A POSTROUTING -j nova-postrouting-bottom
-A OUTPUT -j nova-api-metadat-OUTPUT
-A nova-api-metadat-snat -j nova-api-metadat-float-snat
-A nova-postrouting-bottom -j nova-api-metadat-snat