[asterisk-bugs] [Asterisk 0018172]: Peer goes unreachable when placing a call from it.

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=18172 
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Reported By:                jordankirby
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18172
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     closed
Asterisk Version:           1.8.0-rc5 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 no change required
Fixed in Version:           
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Date Submitted:             2010-10-20 06:23 CDT
Last Modified:              2010-10-22 07:38 CDT
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Summary:                    Peer goes unreachable when placing a call from it.
Description: 
We are using 1.8RC5, Asterisk RealTime (MySQL) and realtime caching.
Both the server and the phones are behind separate NAT (phone in office,
server in data centre).

In this example, SIP/3001 calls SIP/3002 (via a gosub). The call proceeds
fine but asterisk sees SIP/3001 as unavailable for a period of time after
the initial invite.

This looks to be because asterisk starts sending OPTIONS and NOTIFIES to
the LAN IP address of the phone rather than it's NATed IP address.

In the attached trace:
  10.50.0.47 is the server's LAN IP.
  212.62.4.230 is the server's NATed IP.
  192.168.1.231 is 3001's LAN IP.
  195.59.152.66 is 3001's NATed IP.

Asterisk output:

  == Using SIP RTP CoS mark 5
    -- Executing [3002 at DLPN_All:1] Gosub("SIP/3001-000000aa",
"internal,3002,1")
    -- Executing [3002 at internal:1] Dial("SIP/3001-000000aa", "SIP/3002")
  == Using UDPTL CoS mark 5
  == Using SIP RTP CoS mark 5
    -- Called 3002
    -- SIP/3002-000000ab is ringing
[Oct 20 12:11:05] NOTICE[24099]: chan_sip.c:24694 sip_poke_noanswer: Peer
'3001' is now UNREACHABLE!  Last qualify: 37
  == Spawn extension (internal, 3002, 1) exited non-zero on
'SIP/3001-000000aa'
    -- Registered SIP '3001' at 195.59.152.66:17261
[Oct 20 12:11:55] NOTICE[24099]: chan_sip.c:19523
handle_response_peerpoke: Peer '3001' is now Reachable. (34ms / 2000ms)

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Issue History 
Date Modified    Username       Field                    Change               
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2010-10-22 07:38 pabelanger     Status                   new => closed       
2010-10-22 07:38 pabelanger     Resolution               open => no change
required
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