Commit Graph

15 Commits

Author SHA1 Message Date
Mike Pritchard
69bd852dd0 Some minor mdoc style and spelling fixes. 2000-03-24 02:05:54 +00:00
Sheldon Hearn
f2e366a105 Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.
2000-03-01 14:09:25 +00:00
Robert Watson
d98722bcb9 - As jail(8) has been almost completely rewritten, prepend another copyright/
BSD-style license, as an add-on to phk's beerware license.  Please fedex
  some beer to phk.

- Add a ``make depend'' line to the jail-building, which fixes openssl,
  among other things.  Suggested by: kris

- Add ``newaliases'' to the list of things to do when setting up a new
  jail, so that the jailed sendmail doesn't complain.

- Correct references to ``kern.jail.set_hostname_allowed'' which now read
  ``jail.set_hostname_allowed''.

- Add a reference to sysctl.conf where the sysctl can easily be set in
  a persistent way.

- Add a list of cross references to the man page.

- Fix a formatting nit or two.
2000-02-20 02:51:11 +00:00
Robert Watson
c2edcb1a5c Fix up a few documentation nits in jail(8), as well as improve the
instructions so as to reduce warnings during jail startup, etc.
Add a somewhat bolder warning recommending the use of
kern.jail.set_hostname to limit jail renamining.
2000-02-18 19:02:22 +00:00
Robert Watson
09aa405f34 Modified jail.8 to correct a typo (inetd_flas vs. inetd_flags), and add
a comment to the effect that I'm responsible for the additional
documentation, et al, so that phk gets fewer messages about my errors.
2000-02-16 23:50:43 +00:00
Chris Costello
05181f633f Add Robert Watson's much extended documentation including that of the
kern.jail.set_hostname_allowed sysctl MIB.

Submitted by:	rwatson
2000-02-13 05:15:29 +00:00
Robert Watson
34d226d7ff Clean up the jail(8) documentation so that it suggests building a jail
userland in a safer way.  Using the NO_MAKEDEV argument in make
distribution prevents the creation of a number of unsafe device nodes
in the jailed /dev, including disk devices, and more.  This depends
on an earlier commit to /etc/Makefile to provide the NO_MAKEDEV
support.

Approved by:	jkh
2000-02-09 04:17:41 +00:00
Jeroen Ruigrok van der Werven
5e4614fe95 Properly manify this manpage. 1999-12-21 11:25:10 +00:00
Poul-Henning Kamp
ad1720d30c A procfs mount is no longer needed for a jail. 1999-12-05 09:28:59 +00:00
Poul-Henning Kamp
7248ef86e0 Add a version number field to the jail(2) argument so that future changes
can be handled intelligently.

WARNING:  you will need to reinstall #includes and recompile jail(8).
1999-09-19 08:36:37 +00:00
Peter Wemm
97d92980a9 $Id$ -> $FreeBSD$ 1999-08-28 01:35:59 +00:00
Poul-Henning Kamp
df99b42329 Add example of how to create a jail. 1999-07-09 21:35:50 +00:00
Poul-Henning Kamp
c020621f03 Various cosmetics.
Submitted by:	Rudolf Cejka <cejkar@dcse.fee.vutbr.cz>
Reviewed by:	phk
1999-05-05 19:23:45 +00:00
Poul-Henning Kamp
ce5c1cd1ff Fix various bogons.
Submitted by:	Rudolf Cejka <cejkar@dcse.fee.vutbr.cz>
Reviewed by:	phk
1999-05-04 18:20:53 +00:00
Poul-Henning Kamp
75c1354190 This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing.  The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.

For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact:  "real virtual servers".

Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.

Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.

It generally does what one would expect, but setting up a jail
still takes a little knowledge.

A few notes:

   I have no scripts for setting up a jail, don't ask me for them.

   The IP number should be an alias on one of the interfaces.

   mount a /proc in each jail, it will make ps more useable.

   /proc/<pid>/status tells the hostname of the prison for
   jailed processes.

   Quotas are only sensible if you have a mountpoint per prison.

   There are no privisions for stopping resource-hogging.

   Some "#ifdef INET" and similar may be missing (send patches!)

If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!

Tools, comments, patches & documentation most welcome.

Have fun...

Sponsored by:   http://www.rndassociates.com/
Run for almost a year by:       http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00