Server on debian stopped working

[thedogg]

Today after almost 3 years of running openvpn server on debian it just stopped working. Although the status is running/active, not clients gets connection, rassbian, other debians, android, windows. Nothing works, yesterday they were all fine. I generated new user and it is still the same. On windows I get peer certificate verification failure. (Linux debianDELL 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64)

On android it gives:
TLS_Error:BIO read_tls_read_plaintext_error
TLS object-> incoming plaintext read error
TLS handshake failed

Is there any solution co check what is going on and what has happend? Could you please support?

Now I also see that the certificate has expired. Would you help?

[openvpn_inc]

Hello thedogg,

If this is OpenVPN Access Server, you should upgrade to the latest version and then download a new client connection profile. The Access Server will replace the expired CA with a new valid one, and a new connection profile will get a new valid certificate again.

If this is an open source OpenVPN implementation you'll have to make a new CA certificate and new client certificates, as it seems things have expired. You can check which ones exactly have expired and replace those.

Kind regards,
Johan