[asterisk-bugs] [Asterisk 0016425]: SIP qualify fails unless NAT is enabled

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16425 
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Reported By:                hevad
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16425
Category:                   Channels/chan_sip/TCP-TLS
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.1 
SVN Revision (number only!): 233730 
Request Review:              
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Date Submitted:             2009-12-10 13:33 CST
Last Modified:              2009-12-10 14:36 CST
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Summary:                    SIP qualify fails unless NAT is enabled
Description: 
Using a SIP device on the same subnet as asterisk fails to qualify unless
nat option is enabled. The device will register fine and can make outgoing
calls but will not receive calls.
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 (0115094) ebroad (manager) - 2009-12-10 14:36
 https://issues.asterisk.org/view.php?id=16425#c115094 
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"The problem appears to occur when the SIP client listens on a different
port to that which it sends on. "

Which is fine since Asterisk is supposed to use the existing connection to
send the OPTIONS message. Qualify merely lets Asterisk know that the peer
is still functional, which is why your inbound calls are failing. Asterisk
probably lists the peer as UNREACHABLE because the attempt to send the
message fails. What happens if you disable qualify on the peer? 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-10 14:36 ebroad         Note Added: 0115094                          
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