[asterisk-users] [NAT] SSH vs. OpenVPN?

[Gilles]

Hello

	In case a NAT firewall prevents using STUN to open SIP/RTP ports, a
solution is to first connect the phone to the Asterisk server through
a tunnel, and then have data go through the tunnel.

Are there hardphones that support OpenVPN?

If none, what about SSH? Is this a good alternative to use VoIP with
SIP?

If you've tried either or both solutions, I'm interested in any
feedback.

Thank you.