[Freeswitch-users] Freeswitch behind NAT with 2 external providers: No audio

[Peter Steinbach]

Hello,

I have the following scenario

  * Freeswitch is behind NAT with external profile with ext_sip_ip and
    ext_rtp_ip
  * Echo from an external SIP provider test inbound works with audio
  * Calling outbound to the same external SIP provider works with audio
  * *Receiving a call from the external SIP provider and bridging it to
    another number at the same external SIP provider does not have audio*
  * Receiving a call from the external SIP provider and bridging it to a
    local Patton PRI works with audio

I also set up another (modified NAT) profile

  * like external profile - but with a different ext_rtp_ip
  * calling outbound to via NAT profile to another SIP provider works
    with audio
  * *Receiving a call from the external SIP provider (external profile)
    and bridging it to another number ****at the another external SIP
    provider ***(nat***profile)** does not have audio*
  * Tcpdump btw. does not show an attempt of Freeswitch to issue any
    outbound RTP packet. I can see only SIP messages towards the
    outbound SIP provider*
    *

So I think, there is a problem with briding a natted external call  to
another natted external call, both with ext-rtp-ip. It tried this on an
older Freeswitch (1 year old) and with a more recent Freeswitch (1 month
old), both behave the same. Same scenario with a non-natted Freeswitch
works fine.
Btw. Freeswitch logs do show
    RTCPpacket not written
right after bridginbg the call.

Question: Does anybody have a clue, what could cause the problem? Maybe
there is any parameter in the profiles, that may help?


-- 
With kind regards
Peter Steinbach 

Telefaks Services GmbH
mailto:lists (att) telefaks.de
Internet: www.telefaks.de

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