It's all in the subject. rebooting after upgrade and my VPN to the other OPNsense is blown away
I'm kind of a novice at this but my OpenVPN configuration still works after upgrading from 22 to 23.
I quote myself, and tell you that VPN is working. Turned out that my provider had been so kind to give my WAN interface a new IPv4-address, so the client side didn't let the server in until after I had changed the DNS IP-address.
The problem with not having a fixed IP-address on the WAN.