This tutorial shows how to do initial installation and configuration of Varnish Cache, Centos 7. Read More
Filezilla: The server’s certificate is unknown error prevents you from connecting to your server over secure FTP connection.
As now all is moving to https it’s also good to enable SSL/TLS for FTP to protect plain text login credentials.
As you can see on the above screenshot, the server SSL certificate seems to be expired, even though we know that this is not the case.
Obviously the FTP server is pulling the the wrong certificate. Read More