Hi,

We have some SIP UAs behind NAT. It is capable of sending NOTIFY messages to keep NAT binding fresh. I am thinking about two setups and would like to know which one has less hit on ser’s performance.

. Register with ser every 150 seconds, assume that most NAT udp binding is 180 seconds.

. Send Notify every 50 seconds, the NOTIFY includes the authentication nonce from REGISTER message. So ser can verify that the message is real and send a 200 OK back.

Your option is appreciated.

Thanks,

Richard