[Asterisk-Users] MGCP behind NAT

[Humberto Atristain]

My trouble is that the MGCP devices lost the connection with the
asterisk


My gateways are ASKEY MGCP

Any comments?

Humberto


-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of
ishpreet at optonline.net
Sent: Miércoles, 30 de Julio de 2003 05:07 p.m.
To: weppler at wwworks-inc.com
Cc: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] MGCP behind NAT

Hello Wade:

There is MGCP firmware available too which appears to help in NAT mode.
I have been playing around with these CPG for quite a few months now. 

I have been able to get them to work only with G711 codecs. I was unable
to create a coding profile to work successfully with either G723 and
G729 codecs. Have you tried to use these codecs on the DG104S ??? Maybe
we exchange some notes on this.

Ish


--__--__--

Message: 8
From: "Wade Weppler" <weppler at wwworks-inc.com>
To: <asterisk-users at lists.digium.com>
Date: Wed, 30 Jul 2003 15:09:35 -0400
Subject: [Asterisk-Users] MGCP behind NAT
Reply-To: asterisk-users at lists.digium.com

Hi,

After spending some time trying to get a DG-104S working behind NAT,
I finally found the problem.

I made the incorrect assumption that nat=yes in mgcp.conf works just
like sip.conf.  The channels within a gateway are treated more closely
to
zap channels than sip channels (from a .conf standpoint).

What this means is that you have to put nat=yes BEFORE any
subchannel definitions:

This works:

nat=yes
line => aaln/1
line => aaln/2
line => aaln/3
line => aaln/4

This doesn't:

line => aaln/1
line => aaln/2
line => aaln/3
line => aaln/4
nat=yes


This makes sense if lines were treated as individual channels through
NAT,
but they aren't.  NAT capability is dictated by the Gateway itself, and
not
each endpoint/subchannel.

I hope this saves somebody some time.

-wade




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