The "Requested service is not implemented" error occurs when the client receives a
SSH_MSG_UNIMPLEMENTED response from the server (see RFC4253). Without further investigation, we are unable to tell whether this is a fault in Rebex SSH or not.
Please create Verbose communication log and send it to firstname.lastname@example.org for analysis. The log can be done like this:
var session = new SshSession();
session.LogWriter = new Rebex.FileLogWriter(@"c:\data\ssh.log", Rebex.LogLevel.Verbose);
Rebex.Net.Ssh class is part of Rebex Terminal Emulation product. If you have bought Rebex SFTP product, the class is not included.