I have openser 1.1 installed on a machine which has an
ADSL internet connection.
My question is: as the ip address is a public IP (80.xxxx...),
do I need any module for nat tunneling? (mediaproxy or nathelper...)
I mean, if all the UAs are connected to internet via ADSL (different providers), do I
need to set NAT modules?
yes, you do. I recommend mediaproxy...