topic RTP Port forwarding in Network Security

RTP Port forwarding

zbresee08 — Mon, 11 Mar 2019 20:51:30 GMT

Hello all;

I need to forward RTP traffic to an internal IP address. It appears the port range will be 10,000 to 20,000, and I cannot set up a match protocol RTP

((config-cmap)#match protocol rtp

% Invalid input detected at '^' marker.

)

How can I get this port range forwarded to my internal IP? I have an asterisk based server on the internal network and I am experiencing one way audio issues as the server connects to the SIP account and is able to send audio but cannot establish an inbound connection for return audio. I am using an 871 router.

Thanks!

Zach

Re: RTP Port forwarding

Anu M Chacko — Mon, 27 Jun 2011 19:40:05 GMT

Hi Zach,

You can forward the range in an access-list:

access-list acl_name permit udp any any range 10000 20000

Hope this helps!

Regards,

Anu

P.S Please mark this question as answered if resolved. Do rate helpful posts!

RTP Port forwarding

Loren Kolnes — Mon, 27 Jun 2011 19:40:58 GMT

Hi Zach,

Do you have SIP inspection enabled on the ASA?

Thanks,

Loren

RTP Port forwarding

Loren Kolnes — Mon, 27 Jun 2011 19:42:29 GMT

Hi Zach,

I meant o say is SIP inspection enabled on the router.

Thanks,

Loren

RTP Port forwarding

lusandi — Tue, 28 Jun 2011 13:35:26 GMT

Zach,

I hope you are doing great,

By any chance can you post the rotuer configuration, and also if you can provide a packet capture of the working and failling comunication that would be very helpful.

Regards,

Luis Sandi