[asterisk-bugs] [Asterisk 0018424]: [patch] Temporary answers are sent to the wrong IP

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=18424 
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Reported By:                oej
Assigned To:                mnicholson
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Project:                    Asterisk
Issue ID:                   18424
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     acknowledged
Target Version:             1.4.41
Asterisk Version:           SVN 
JIRA:                       SWP-2683 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-12-04 09:16 CST
Last Modified:              2011-01-26 15:16 CST
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Summary:                    [patch] Temporary answers are sent to the wrong IP
Description: 
When sending a bad message to asterisk we use a temporary pvt to respond.
If I send a message from a SIP device behind a NAT to an Asterisk on a
public IP, Asterisk ALWAYS answer to the address in the via: header. This
is not compliant with RFC 3261 and also opens up for using Asterisk for
sending messages to other host. If I send a SIP message with a via: header
for pbx.digium.com all the responses will be sent there.

We should really ALWAYS send responses to the sender's IP and port
(another issue here in the tracker correctly points that out). In other
cases, you can sort it out by setting NAT=yes in the general section.
However, that doesn't apply on temp_pvt.

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Issue History 
Date Modified    Username       Field                    Change               
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2011-01-26 15:16 mnicholson     Summary                  Temporary answers are
sent to the wrong IP => [patch] Temporary answers are sent to the wrong IP
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