[Serusers] Outbound proxy

[Iqbal]

Hi

I have a dumb question, it conecrns NAT and ser. I am using xlite and 
grandstream 486 to test with, SER has been working great in all 
situations, however I have realised that if I dont put an entry into 
outbound proxy, then REGISTER does not work if behind a NAT. When I put 
an entry into there it works, I am using mediaproxy which is running on 
the same server as ser.

The question is what is the outbound proxy settings for in the UA, I 
assume it is/was either for NAT, or when the register server is separate 
from the proxy I guess.

If its for the NAT then shouldnt my mediaproxy ser combo take care of 
it, since I am dealing with most NAT options at the SER/MP end.

Iqbal