[asterisk-users] [NAT] * + private IP + locked-down firewalls?

[Gilles]

On Mon, 05 Jul 2010 12:45:34 +0200, Gilles <codecomplete at free.fr>
wrote:
>Provided the user doesn't have access to the firewall (eg. corporate
>or hotel), and the firewall doesn't allow dynamic port opening through
>UPnP or NAT-PMP...

For those interested, I was tipped through private e-mail about using
OpenVPN to open a steady tunnel between the client and Asterisk, and
have the SIP client send packets through that tunnel instead of trying
to connect directly.