[asterisk-users] Cisco 7940 - NAT Option

[sandeep kalra]

>>. Could it hurt something when they are used inside our LAN with NAT
>> enabled?

The answer is no!

With my test bed, I found that Asterisk can detect Endpoint behind NAT(match
via and src_ip).

So, once the EP is on LAN (same side of NAT) then they work as if there is
no NAT. The option of nat=yes is immaterial.


Thanks and Regards
--Sandeep Kalra
------------------------------------
Ph: +91-120-4342000-X-2966
    : +91-120-4342966 (direct)
www.globallogic.com


-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Brent Torrenga
Sent: Monday, December 18, 2006 9:37 PM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] Cisco 7940 - NAT Option

I am thinking of turning on the NAT option in our Cisco phones (and the
corresponding sip.conf modification) to allow the phones to be taken outside
the LAN.

Can anyone think of any reason not to just always turn on the NAT enabled
option? I can't think of a reason not to always operate these phones with
this enabled, since it would likely allow them to be taken outside our LAN
and used. Could it hurt something when they are used inside our LAN with NAT
enabled?


Sincerely,

Brent A. Torrenga

Torrenga Engineering, Inc.
907 Ridge Road
Munster, Indiana 46321-1771

tel:+1 219 836 8918 x325
fax:+1 219 836 1138
email:brent.torrenga at torrenga.com
web:www.torrenga.com

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