Manually change a config file

[Norbert78]

Hi forum,
I need to change a config file for openvpn manually. The file lays under /var/etc/openvpn and is a client configuration.
However, when logging in to my pfsens via ssh and changing the file, I always get an error: file cannot be written (even though I'm using sudo). And when I create a new file  in this folder it is gone after a reboot.
So my question is obvious: What do I have to do to get manual access to such a file?

Thanks
Norbert

[Norbert78]

Argh, I just found out that I myself put the immutable flag on for this config file. After turning this off, everything behaves again as expected…..