rsh through a firewall

[Yves . Dherbecourt @ der . edf . fr (Yves Dherbecourt)]

Does a rexec and/or rsh proxy exist somewhere ? It may seem foolish but
could be used together with a telnet proxy. (once the telnet proxy process
is up, and after -strong- authentication of the user, then the rsh proxy 
can be launched, and it dies with the telnet proxy process).

This could allow a more elaborate dialog across a firewall between 2
hosts than a simple telnet.

I looked at TIS plug-gw, but it doesn't fit in that case.

Thank you

Yves Dherbecourt