security and rsh

Greetings,

I have a question concerning security on an system I am building:

It is (supposed to become) a Beowulf Linux Cluster w. Suse 8.0 installed on each node and master.

To run programs on my cluster I need to enable passwordless remote command execution with rsh, so I cant switch to ssh.

I have enabled the rsh-Deamon on all computers.
It has two NICs, one connected to the cluster's switch, the other to the internet.

My question concerns the master:

In the masters hosts.deny the entry
ALL : ALL
was placed and in the hosts.allow the entry
ALL : (some IPs I can trust)
in hosts.equiv all the cluster nodes were placed.