In each case, a person has taken the time to lay out very good directions for installing and configuring these packages. The original articles can be found on the wonderful Stepwise web site by Scott Anguish. The configuration is straight forward. It can contain individual workstations or entire domains. General setup allows access to WSU clients in general and no one from the outside our domain.
Secure shell provides an encrypted session between the client and server.
Telnet, even with tcpwrapper, is still vulnerable to packet sniffing. The documentation is for setting up and using sshd version1. Work is progressing on getting sshd version 2 up and running. This installation will not only install the ssh daemon, but also the ssh client. In order to use secure shell to connect to the Mac OSXS box, you will need a ssh client.