Very Computer

I'm having trouble getting the 'rexec' command to work in Red Hat
6.0 (on several boxes).  I haven't done any special security setup
on these boxes (I'm behind a firewall).  I'm using the default
configuration in inetd.conf, and haven't added any entries to
/etc/hosts.allow or /etc/hosts.deny .  I have set up ~/.rhosts
correctly (as per 'man 5 hosts_access') with permissions of 0600.
In all respects, my network setup works very well.

So: why does this command merely hang:

   $ rexec stubble pwd
   <... and it hangs interminably at this point>

... as does this one:

   $ rexec -d -n stubble pwd
   rexec: Host = stubble
   rexec: Command to execute =  pwd
   Username at stubble: fred
   Password: <mumble>
   <... and again it hangs interminably>

... but  rsh  works beautifully, and almost instantly:

   $ rsh stubble pwd
   /home/fred
   $

I'm stumped.  Thanks in advance for your help!

Regards,

Fred Surr