New comment by TinCanTech on void-packages repository

https://github.com/void-linux/void-packages/issues/23413#issuecomment-656766406

Comment:
> Furthermore the Server does not have to care about the version of a client lib

I am not particularly familiar with LibreSSL but OpenVPN use an `SSL/TLS Cipher suite name translation table` (see `ssl.c` in the OpenVPN source tree) for OpenSSL .. so I think it is very likely that the server and client use  SSL libraries which match this OpenVPN translation on both ends.

This

> is mostly an exercise in frustration

Indeed ..

> Yes, I agree it would be far better if someone does provide a server side configuration + logs that do fail. I don't have any failing setup right now, and don't know why ProtonVPN fails

Setup two servers; One using OpenSSL and the other using LibreSSL.

I'll stay tuned but I'll leave you to it .. good luck.