[asterisk-bugs] [Asterisk 0011200]: Problem when using NAT and Subscriptions

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11200 
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Reported By:                brainy
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11200
Category:                   Channels/chan_sip/Subscriptions
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.13  
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:             11-08-2007 16:39 CST
Last Modified:              11-08-2007 18:55 CST
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Summary:                    Problem when using NAT and Subscriptions
Description: 
Scenario: Several Snom IP Phones behind a NAT Gateway (no Portforwards
exist).

Everything is working fine but then a NOTIFY goes out from Asterisk to a
Phone, the Phone sends back the ACK (the ACK is definititly seen by
Asterisk) it does not recognize it as the right ACK packet. Thats resulting
in Retransmission of already sent and received Packets.

Tests were made with Asterisk 1.4.13 In the Additional Info you can see:
Retransmission http://bugs.digium.com/view.php?id=3, then the ACK packet but
after that, there's
Retransmission http://bugs.digium.com/view.php?id=4 because it didnt recognize
the ACK successfully.
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Relationships       ID      Summary
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has duplicate       0011201 Problem when using NAT and Subscriptions
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---------------------------------------------------------------------- 
 brainy - 11-08-07 18:55  
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Finally i fixed it with that patch!

http://bugs.digium.com/file_download.php?file_id=16131&type=bug 

Issue History 
Date Modified   Username       Field                    Change               
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11-08-07 18:55  brainy         Note Added: 0073424                          
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