[Serusers] NAT and ACK

[Benito Caracuel]

Hello all ,

This is my scenario:

I have SER with Private address behind a Cisco router which Has NAT implemented.

I have two UAs with public address each one.

UA1 ----------------------> Router Cisco with NAT (public IP) ------------------------> SER with private IP 

UA2 <----------------------Router Cisco with NAT (public IP) <------------------------ SER with private IP 

The problem is that when UA1 sends an INVITE with SDP, UA2 reply with 200 ok with SDP but after that, SER doesn't see the ACK. I know that UA1 sends the ACK but this ACK doesn't reach SER.

I think that maybe the problem is NAT.

Is possible to run SER with private address?
How can i solve this?

Help me please.

Thank you very much.

Ben.
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