I'm trying to set up an OpenVPN server on an EC2 instance. There doesn't seem to be any Ubuntu documentation for OpenVPN, so I'm mostly following the instructions here:
My Android phone reports "connection refused". Tunnelblick says "TLS handshake failed".
I would like to check that OpenVPN actually is listening on my server. But there's no OpenVPN process running - it uses systemd. And it uses UDP rather than TCP, so the usual trick of connecting with telnet doesn't work. Can anyone tell me how I can verify that OpenVPN is actually listening?
The server is running Ubuntu Trusty.