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

[Philipp von Klitzing]

Hi!

> >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.

Indeed - and both Snom and Yealink offer phones with OpenVPN support 
built-in. That way you do not need to worry about the router/firewall.

BTW: I see that the Yealink firmware now also comes with 802.1x support. 
Am I correct that no other popular SIP phone brand has that?

Philipp