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.


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