I am trying to setup and OpenVPN between PFSense and a Yealink T26P phone.
The handshake starts but never completes, where can i look in the logs to find out why it is failing? The OpenVPN logs just say it timed out
Need more info. Post a network map.
Try to get the log off the phone, odds are it will tell you why.
Usual suspects: Clock on the phone is wrong/not set, or you're using a cert/key format that the phone does not understand (e.g. you need SHA1 not SHA256)