[asterisk-bugs] [Asterisk 0011756]: Asterisk stops responding to sip traffic if DNS doesn't respond during SIP registration

[noreply at bugs.digium.com]

The following issue requires your FEEDBACK. 
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http://bugs.digium.com/view.php?id=11756 
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Reported By:                staples1347
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11756
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.2.21.1 
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:             01-13-2008 00:33 CST
Last Modified:              01-13-2008 05:37 CST
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Summary:                    Asterisk stops responding to sip traffic if DNS
doesn't respond during SIP registration
Description: 
If the internet gateway goes down or the DNS server stops responding, then
during SIP registration to a VoIP provider, Asterisk will stop responding
to all SIP packets even if they are from other SIP devices such as internal
phones.

To test this either shutdown the internet gateway machine, or block DNS
request packets from the Asterisk machine and wait for the next SIP
registration.  Another way to test is set resolv.conf on the Asterisk
machine to use an invalid IP address for the DNS server, and then restart
Asterisk.

Blocking outgoing DNS directly on the Asterisk machine with iptables or
responding to the DNS request with icmp-host-unreachable 'causes a timeout
to the VoIP provider but doesn't stop other SIP traffic.
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---------------------------------------------------------------------- 
 mvanbaak - 01-13-08 05:37  
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1.2 is in security maintenance only mode.
Can you confirm this one with the latest 1.4 code ? 

Issue History 
Date Modified   Username       Field                    Change               
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01-13-08 05:37  mvanbaak       Note Added: 0076842                          
01-13-08 05:37  mvanbaak       Status                   new => feedback     
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