[asterisk-bugs] [Asterisk 0018833]: SIP over TCP and TLS does not appear to support NAT=yes

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18833 
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Reported By:                Cabel McCoy
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18833
Category:                   Channels/chan_sip/TCP-TLS
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     new
Asterisk Version:           1.8.2.3 
JIRA:                        
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:             2011-02-17 16:55 CST
Last Modified:              2011-02-18 02:29 CST
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Summary:                    SIP over TCP and TLS does not appear to support
NAT=yes
Description: 
I am using a soft client to test SIP over TCP and I am having problems
getting RTP to send traffic back to my NATed ip address. Nat works
perfectly with UDP but not with TCP or TCP/TLS.

Here is the output from my RTP Debug

TCP connection gives me this
Sent RTP packet to      192.168.49.16:10004 (type 09, seq 043932, ts
108160, len 000170)

Which never gets back to me because its my private IP.

UDP connection gives me this
Sent RTP packet to      99.137.230.28:10000 (type 09, seq 015177, ts
000320, len 000170)

Works great.

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 (0132112) wdoekes (reporter) - 2011-02-18 02:29
 https://issues.asterisk.org/view.php?id=18833#c132112 
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I could be wrong, but it looks like the SDP in the UDP case is already
"fixed"/rewritten by an ALG/SBC/router.

I would expect to see the same 192-address in the UDP case, and the RTP
stream to be correctly matched first after traffic *from* your LAN arrives
on the asterisk.

Does any packet *from* your LAN ever arrive in the TLS case? (rtp set
debug on)

What happens with the UDP case if you disable SIP/SDP rewriting in your
router? 

Issue History 
Date Modified    Username       Field                    Change               
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2011-02-18 02:29 wdoekes        Note Added: 0132112                          
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