When I tried to connect to SSH on s4.serv00.com, I was prompted for a password instead of being asked to use a key. However, when I entered my account password, it was rejected, and I was asked for the password again. After several attempts, my IP address was blocked by the Serv00 firewall.
Here is terminal recording: https://asciinema.org/a/gmbqOYPY0jaEqWkrGE5iW4kK4