about "caching only name server" !

Friends ,

If I want to configure "caching only name server " in RHEL 5 , then is it necessary to configure other necessary files which are required for the primary DNS server ?

i.e., For configuring "caching only name server" in RHEL5 , then which files are need to configure only ?

Here is an article from Red Hat Magazine which contains a description of how to do it.