Welcome to the

Qjail project on sourceforge.net

On June 11 2011 the Qjail utility was committed to the FreeBSD port environment.

The qjail utility is used to deploy small or large numbers of jails quickly.

The qjail utility uses the jail(8) method of jail definition and start/stop control.

Qjail [ q = quick ] is a 4th generation wrapper for the basic chroot jail system that includes security and performance enhancements. Plus a new level of "user friendliness" enhancements dealing with deploying just a few jails or large jail environments consisting of 100's of jails.

Qjail eliminates all the jail rc.conf configuration statements normally required to define jails using the "jail" command. Qjail requires no knowledge of the jail command usage.

Qjail automatically populates each newly created jail with the host files necessary to gain network access from the jails first start.

It uses "nullfs" for read-only system binaries, sharing one copy of them with all the jails.

Uses "mdconfig" to create sparse image jails. Sparse image jails provide a method to limit the total disk space a jail can consume, while only occupying the physical disk space of the sum size of the files in the image jail.

Ability to assign IP address with their network device name, so aliases are auto created on jail start and auto removed on jail stop.

Ability to create "ZONE"s of identical qjail systems, each with their own group of jails.

Ability to designate a portion of the jail name as a group prefix so the command being executed will apply to only those jail names matching that prefix.

Qjail reduces the complexities of jail deployments to the novice level. Qjail has a fully documented manpage written for easy comprehension. Details are given to felicitate the use of qjail's capabilities to the fullest extent possible.

The port make files and the package file can be downloaded from here:

Qjail Project Files

For additional Information see these;

Quail Intro

Qjail Manual

Qjail Howto

Qjail Vnet Howto

Qjail IPV6 Testing


This Qjail Documentation is in public domain. This content may be reproduced, in any form or by any means, and used by all without permission in writing from the author.