I would like to connect a new agent to our Jenkins Master. It uses the paragraph character § in the password and the authentication fails (wrong password). Unfortunately, I am not allowed to change the password. 

When I connect manually via ssh from a Linux machine, it asks for the password and accepts it. Without those special characters, the connection would also work from Jenkins. So I assume it's a bug in the plugin. 

Unfortunately, it's not possible to use a SSH key instead of a password with this plugin. Would have been a viable alternative.