so generalizing that "telnet and rsh is bad" is as stupid as telling
that oxygen is bad as it makes fires.
Well, that's true, but if you have the choice, there are better choices.
You *can* hammer in nails with the butt of a gun, but there's a chance
you'll somehow shoot yourself in the arm. A hammer doesn't have that risk.
There have been *many* problems over the years with rsh and telnet.
rsh's security model comes from a time when people thought computers
would never lie to each other. SSH does allow you to give only enough
access, with the side-benefits (in your case) of compression and
encryption. Even if you used ssh without those, the key-based
authentication is still safer, and the code more modern and securely