Sorry mate, I meant NiftyTelnet SSH would work from OS 9, not X.
Not plain old NiftyTelnet, mind you, but the SSH version. You have to futz about in the connection options somewhere, I think it defaults to telnet - been a while since I used it.
Yes, if you turn on remote login in the prefs, that turns on SSH, not telnet. It was telnet in Public Beta, but SSH in the final.
Sorry for the confusion.