OpenVPN Support Forum

Hi all,

From a few days ago, we are not able to use the OpenVPN client to connect to our server. The error message that we get is "There was an error attempting to connect to the selected server. Error message: OpenSSLContext:SSL::read_cleartext:BIO_read failed, cap=2576 status=-1:error:1416F086:SSL routines:tls_process_server_certificate: certificate verify failed" on the version 3.2.3 in Windows. I updated to the version 3.3.1 in Windows too and now the error is "There was an error attempting to connect to the selected server. Error message: Peer certificate verification failure". The connection from an Ubuntu terminal looks to work fine, but not from Windows.
Please, could anyone help us to know any source of this error and how to solve it?

Thank you in advance.
Juan

Hello Juan,

Most likely cause is that the certificate actually is invalid. That's what the message states anyways. It says the certificate verification failed. If it worked before, and now it doesn't anymore, most likely reason is that it has expired recently. I suggest you use openssl to check the client certificate and the CA certificate to see until when it is valid.

Kind regards,
Johan