> 
> I'd like to take an existing telnet based system and, without changing
> the client or server, wrap the session in some kind of encryption.
> 
> It is not required (and is even actively not desired) to use UNIX
> level login; the clients do not go through a normal UNIX login and
> do not have UNIX accounts, in general.

I think that what you want is an SSH or SSL tunnel.  Neither is
difficult to set up.  You can find lots of information on SSH
tunnels on the web.  For SSL tunnels, I've used 'stunnel', which
should be in 'pkgsrc'.  There are a number of other programs that
do the same thing.

David S.

>