Hi all --

We're using SER as a registrar and proxy, and need to deal with the following NAT problem:

• SER is proxying to asterisk, which is behind a firewall.
• Our users are registering with SER, but their UAs are behind another firewall.

We're looking at nathelper and rtpproxy. Two questions:

• Will this combo (SER, nathelper, rtpproxy) work in this scenario to solve the NAT and pinhole issues?
• Does SER have to live outside the firewall, or is there a way it can be behind the same firewall as Asterisk?

Thanks for any insight,

Richard