[asterisk-users] Phone -> NAT/FIREWALL -> Internet -> NAT/Firewall-> Asterisk

[Nick Olsen]

Make sure you have nat=yes in your sip.conf either under globals or 
individual sip peer settings.

Nick Olsen
 Network Operations 
(855) FLSPEED  x106

----------------------------------------
From: "John Millican" <john at millican.us>
Sent: Thursday, January 02, 2014 10:50 AM
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Subject: [asterisk-users] Phone -> NAT/FIREWALL -> Internet -> 
NAT/Firewall-> Asterisk

Hello,
CentOS 6.x and Asterisk 11.x
I have an interesting, to me at least, situation.  Using a Polycom
501(also tried with X-Lite). I have set up Asterisk to accept
registration from the Polycom and it registers successfully but then
withing 30 seconds on the CLI I get the message that the Polycom is
unreachable.  The phone still shows that it is registered and if I try
to place a call from the phone to my Cell, my cell rings once and then
stops.  I get a packet retransmission error:
WARNING[1303]: chan_sip.c:4174 retrans_pkt: Retransmission timeout
reached on transmission 689874757 at 192.168.0.100 for seqno 2 (Critical
Response)
Followed by:
n_sip.c:4203 retrans_pkt: Hanging up call xxxxxxxxxx at 192.168.0.100 - no
reply to our critical packet
I am "assuming" that there is a problem with NAT.  I have externip set
in sip.conf.
Any pointers to what I am missing?
Thanks,
JohnM

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