[asterisk-bugs] [Asterisk 0012670]: some RTP packets sent to NAT IP instead of public IP; breaks built-in jitterbuffer on some phones

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=12670 
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Reported By:                jolan
Assigned To:                
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Project:                    Asterisk
Issue ID:                   12670
Category:                   Core/RTP
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.19-rc3 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             05-16-2008 15:55 CDT
Last Modified:              06-02-2008 17:55 CDT
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Summary:                    some RTP packets sent to NAT IP instead of public
IP; breaks built-in jitterbuffer on some phones
Description: 
I am experiencing the same symptoms as
http://bugs.digium.com/view.php?id=0012566 but with 1.4.20-rc3, not
trunk.  The bug was fixed in trunk, but not in 1.4.x.

To reiterate the problem:

Phone 100 calls phone 102.  Phone 102 answers and starts counting "1 2 3 4
5".  Phone 100 doesn't hear anything until "3" or "4".
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---------------------------------------------------------------------- 
 jolan - 06-02-08 17:55  
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Looking at packet number 975 in the badnat.pcap again:

Ethernet II, Src: Cisco_c2:f9:4e
f: "7940 g711" <sip:100 at 209.242.35.6>;tag=as4f924dfb
t: <sip:102 at 10.0.0.96:5060>;tag=429ED0C-8F026405
User-Agent: PolycomSoundPointIP-SPIP_601-UA/2.0.1.0313

Am I reading that right?  A packet from the Cisco has the User-Agent set
to Polycom?  I also don't understand why there are SIP compact headers. 
Neither the Cisco, the Polycom, or Asterisk is configured to use compact
headers. 

Issue History 
Date Modified   Username       Field                    Change               
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06-02-08 17:55  jolan          Note Added: 0087688                          
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