Purpose: describe what ssh is, where to find it, and what connections to Tcl it has.
http://en.wikipedia.org/wiki/Secure_Shell is a good place to start.
Note that the security infrastructure of SSH is completely separate from that of SSL.
See http://www.openssh.org/ for an open implementation of the secure protocol for starting shell commands across an inter/intranet. http://www.ssh.com/ is another site at least associated with source code base for SSH implementations.
http://www.phaseit.net/claird/comp.security.ssh/ssh.html may also be of interest.
Anyone know of a Tcl extension binding to one of the ssh libraries?
AMG: I whipped up a Tcl script that allows you to ssh to multiple hosts at the same time, using a single command and a single set of stdin/stdout/stderr. Try running bash with it, heh heh. (It really works!) For details, see multissh.
Russell Treleaven reports [L3 ] that he successfully automates ssh client sessions on a Windows host with ActiveState's Expect and the ssh2 executable [L4 ]. He uses the "send slow" option. Both of these applications are proprietary.
TV I've within some limitations, used the cygwin ssh facility, which is quite extensive, except varying from a drag to requiring out of package documentation to install. It is almost unix, though. It also contains working executables to use openSSL to create and deal with certificates, I used it succesfully to make a secure httpd tick, except I forgot how.