[asterisk-users] Asterisk and Grandstream both behind different NAT

Hi,

 

i am facing some problem configuring 2 Grandstrem phones 101 behind NAT. I have put server ip as 192.x.x.x and OutGoing proxy as 72.x.x.x, i have forwarded ports on both Grandstream and Asterisk sides, and using those ports on Grandstream for SIP and RTP with random ports =no. This setup is working however  at a time only one phone gets registered. Has someone experienced the same problem....any suggestions?

 

Thanks in advance,

 

Viv