[Asterisk-Users] Problem with NAT on Asterisk 1.0.1

[Tim Thompson]

This is not an Asterisk Problem.

It is a SIP problem and most likely related to the different firewalls the
SIP phones are located behind.

You will need to configure the firewalls, use real addresses for the SIP
phones, or use IAX clients for phones behind firewalls.

Tim.



-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Vargas Octavio
(ATI Chile)
Sent: Monday, November 15, 2004 2:34 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] Problem with NAT on Asterisk 1.0.1

Hello:

We have a strange problem with Asterisk 1.0.1
We made a succesfully installation of Asterisk over RedHat. We have a FXO
card installed and configured, and works great.
The Asterisk have a public IP address and the users are behind a firewall
and use invalid IP addresses
 We made some test with X-lite, and a couple of IP-Phones (GoldenNet EMT-22
and ET-22). The X-lite users can made and receive calls between each others
but IP-Phones didn´t receive calls, but can  made callings to xlite users or
to the other IP-phone.

All the users are registered in Asterisk, and was configure as this extract
of sip.conf:

[1234]
type=friend
context=local
username=1234
secret=1234
host=dynamic
qualify=1000
nat=yes
mailbox=1234

We installed Debian to probe another Linux distro, we use the same machine
with the same hardware and configuration files, and the IP-phone can made
and receive calls without problems. Even all the users can made callings
using the FXO card (Zap channel).


Only for test purposes we installed the IP-phones on the external side (with
valid IP's) and...... the IP-phones work great.


Did anybody have an idea about what is the problem with the configuration
files in the asterisk? 
We are clear about NAT is the origin of the problem, but we don´t know why
worked with Debian and not with RedHat.

Any advice or suggestion will be very useful.

Cheers,

Octavio Vargas
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