OpenVPN Security Advisory: Dec 14, 2018
Action needed: Important update for OpenVPN Access Server

Can I run multiple OpenVPN tunnels on a single machine?

FAQ

Yes, of course.

If you are running 2 or more OpenVPN instances on the same machine, you will need a separate virtual TUN/TAP adapter and a separate port (using the port directive) for each instance.

Make sure each TUN/TAP adapter has a unique, non-overlapping subnet using serverserver-bridge, or ifconfig.

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