chroot question

[Marc.Thach at radianz.com]

Only one kind of chroot jail, but the book decribes in a particularly
economical way.   The various web resources can be confusing and the
process is somewhat platform-dependent.  So if you tell us what platform
you're using somebody else may have already done it.

Marc TXK
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                    "lg042-5"                                                                                   
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                    04/07/2001                                                                                  
                    15:50                                                                                       
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I may have all wrong, please let me know :
I read some documents about building a "chroot jail" for Bind.
They describe a more or less complex process creating a completely new
environment for Bind.

I also found information in O'reilly's DNS and Bind about a kind of
build-in
chroot.
Is it something different? Which one should I use?

Is there really 2 kinds of chroot when speaking about Bind : the built-in
chroot and the chroot jail ?
I have understood that the chroot jail is redefining an entire environment
(file system, directories, librairies...) for named and named-xfer.