Setting up a FreeBSD Jail

The Jail in FreeBSD offer a bit higher security then chroot found on other BSD's and GNU/Linux. Jails are good when one want to isolate deamons or even running complete(stripped) systems inside Jail.

FreeBSD have good documentation covering creation of a jail.
URL
http://www.freebsd.org/cgi/man.cgi?query=jail&apropos=0&sektion=0&manpath=FreeBSD+4.8-stable&format=html