Actually, the r* commands are fine if you have a trusted network as we do where I work. I use rlogin and rcp on a weekly basis. If you are in an unsecure network, JP is correct. Also, JP may be right in saying that your r*commands and rsh may be disabled by your company.
If they are not disabled...
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I would recommend using rlogin and rcp if you can setup .rhosts on your servers.
All servers must be in a trusted network to use these safely. However, I would prevent users from having .rhosts in their home directories because they would be able to allow unwanted access to your systems.
To configure .rhosts, have each system name in the .rhosts file on the other box, usually in the / or /root directory depending on your OS configuration.
Then you could use rlogin to get to the other box or rcp to copy to or from each box.
