When I tried to connect with rsh to solaris 2.6 machine from my redhat 9.0 machine I had a problem.
For example a simple command :
[operator@ldw1 tmp]$ rsh scmssrv1 "ls"
poll: protocol failure in circuit setup
When I tried exactly the same thing from a redhat 8 machine there is no problem. The unix machine same and rlogin works for both redhats.
I tried to install and use the same rsh and rsh-server packages on the redhat machines but there was no change.
Thanks for your help.