rhost authentication

[carlos m. martinez]

Hi,
I have installed RH Fedora core release 1. I can do ssh to another host
in my LAN but I can't do rsh. Te messages are: no route to host (from
host1) and connection refused (from host2).
I need do rsh without type password. I know that it's possible with ssh
too (ssh-keygen, ssh-agent) but I don't care about security and need rsh
to run another application that use it.... 
What can I do. I'm new in Linux