you have to put a .rhosts file in the $home directory on the remote and local server, which contains the remote hostname and the user who wants to connect to.
(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post or send a private message where your goal is to get an answer more quickly.
Permissions on .rhosts should be 644 (on some systems 600) owned by the account concerned or (preferably) root. Many unixes will ignore a .rhosts file which has incorrect permissions as an anti-hack measure.
To emphasise the reply from "tahleen":
No IP addresses in .rhosts - it must be the exact host name and precisely match that server's entry in /etc/hosts.
See "man .rhosts".
Tip: If you put your own host name and username in .netrc in your home directory on your local computer you can test rcp to yourself.