[OpenSIPS-Users] static nat and 1 to 1 nat

John Quick John.Quick at smartvox.co.uk
Wed Nov 11 12:25:07 CET 2009


As far as I can tell, the records in location table that have null in the received column are those
where the client device is aware of its NAT environment and has already substituted the correct
external IP address and port number. For example IP phones that are using STUN.

John Quick
Smartvox Limited

> Date: Tue, 10 Nov 2009 11:55:57 -0600
> From: Alex G <greekman0000 at gmail.com>
> Subject: [OpenSIPS-Users] static nat and 1 to 1 nat
> To: OpenSIPS users mailling list <users at lists.opensips.org>
> Message-ID: <658acb0911100955r44cb07n16727982f772f930 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
> I'm curious...
> Do static or 1 to 1 natted locations produce a null resort  in the received
> column of the location table?
> Some natted locations show received as the outside ip and contact with the
> inside ip which is usually an internal ip behind a firewall.
> Some others show null as the received and a the contact has a public address
> followed by a port. These devices are obviously natted because I see many of
> the same ip with different ports.
> Is the difference b/w these 2 types a static nat port or is it something
> else?
> Thanks!

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