Hi all..
 
My test environment is:
 
SER use publice IP address at 163.25.xxx.xxx
User A and B use private IP address at 192.168.1.xxx and 192.168.1.xxx( Publice IP is 220.135.xxx.xxx)
 
While A call B,  I check the content of SDP that A send to B have rewrite from "IPv4 192.168.1.xxx" to "IPv4 220.135.xxx.xxx"
However, the session still cannot create successful.( I use Windows Messenger to be User Agent)
 
Please give me some advices, thanks!
 
Caxton