Have been reading about the mention of symmetric and non-symmetric ( asymmetric ) nat, with most of the material mentioning that Linux/iptables/netfilter implementing symmetric nat. Not that I am advocating non-symmetric nat, is there a way to mimick asymmetric nat on Linux ? I want to have a way to simulate such nat on Linux for the purpose of testing STUN client and server with regards of running SIP phones. Any input is greatly appreciated.
