[SR-Users] SUBSCRIBE NAT Keep-Alive

Hi All,

I'd like to ask the guru's out there their opinion on how to solve the nat problem for presence subscriptions.

We have an issue with subscriptions that get timed out and the notify clears the subscription out of the active_watchers table due to the notify timing out, I think this is expected and the right way to do it. However, how do others out there ensure that their subscription nat states are kept alive? For registrations we have nathelper, but, what is the sanest way of doing the same for subscriptions?

I was originally thinking of sending notifications through our registrar/lookup  server, but, I'm not sure if that is the correct way to do it.

Any thoughts, tips, tricks would be much appreciated.

Cheers