OpenVPN Support Forum

Is it possible to make OpenVPN to use any standard protocol (like STUN or TURN or other) to help two end-points meet if both of them are on private IP-addresses (i.e. behind NAT - each of its own)?

There are lots of public STUN servers - if OpenVPN could use them that would be a significant improvement in functionality.

Please comment.

Thank you in advance.

Learned myself about types of NAT.
It is clear to me now that - if NAT is any type of "conical" family - a direct connection between two NATed clients is technically possible. Only the "symmetrical" type of NAT forbids it.

Now I'm investigating if it is possible to piggy-back OpenVPN on SIP. So far seems viable - if NAT implementation permits.