I had an OpenVPN TUN configuration which used to work, but stopped working some time last year. I had the help of a consultant who got it working using TAP, but TUN just doesn’t work. If I try, the service just doesn’t restart. I can’t even find any useful error messages, but changing TUN to TAP is the only thing that works.
I need TUN if I want to connect my iOS devices.
Has something changed, or broken in OpenVPN? What can I do to get to the bottom of this?
I am running Centos 6 which is otherwise up to date.