[OpenSIPS-Users] RTPPRoxy behind NAT

Nick Chang nick.chang at kland.com.tw
Tue Sep 11 04:54:11 CEST 2012

Hello Sammy


No, I don't forget.


My rtpproxy's  startup script is "/usr/local/bin/rtpproxy -l -s udp: 19999 -F -m 36000 -M 36010 -d

I have forwarded the 36000~36010 port to rtpproxy server.


Firewall  -----------------------  Opensips/rtpproxy Server             

But, Now sometime no audio.  

Do you have any suggest





From: users-bounces at lists.opensips.org
[mailto:users-bounces at lists.opensips.org] On Behalf Of SamyGo
Sent: Tuesday, September 11, 2012 10:28 AM
To: OpenSIPS users mailling list
Subject: Re: [OpenSIPS-Users] RTPPRoxy behind NAT


Hi Nick,
So you've forwarded the 5060 port to opensips server, cool. Did you forget
to mention about the RTP ports forwarded to server ? 
Start RTPproxy with param -m and -M to assign range of RTP ports to use.
Then forward that UDP port range to opensips server too.
Then see what happens with audio.
Also what is your total voip diagram with their network addresses. 


On Sep 11, 2012 6:46 AM, "Nick Chang" <nick.chang at kland.com.tw> wrote:

Hello Sammy


My NAT type is Full cone NAT.


In Firewall, I setting a IP & port 5060 to LAN IP.




Firewall  -----------------------  Opensips Server             




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