[Users] detecting if both caller and callee are behind NAT

Hi all, I am trying to implement the following scenario: Whenever a NATed client calls to user at public IP or whenever a user at public IP calls a NATed client, I dont want to use mediaproxy. the fix_nated_sdp function does the job. But when both the caller and callee are behind nat, only then mediaproxy should be used. Can someone please help me in defining a condition which will return true if both the caller and callee are nated. I tried a lot, but my conditions allow calls from NATed client to public IP clients to use mediaproxy which I dont want. Please help me in this regard, as I want to minimise the use of mediaproxy as much as possible. Thanks in advance, jayesh --------------------------------- Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time.