[Serusers] Basic Asterisk Setup

Hi, I have an Asterisk box up and running behind a NAT (Local IP Address 192.168.1.250). I would like to have another Linux box with SER as a proxy/registrar server on the same NAT (Local IP Address 192.168.1.150) to have a remote phone on ANOTHER NAT to register to the Asterisk server. My Questions are: SER Server: - Which ser.cfg shall I use, the default cfg file or any other cfg on the examples folder? - Do I have to have a Domain? - Do I have to Port Forwarding 5060 to the SER box? Asterisk Box: - What are the changes required? Client (Phone): - Do I have to use Outbound Proxy and point it to the WAN IP Address of the NAT’s Router? - Any other special configurations required? Any help is highly appreciated. Regards. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com