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Date:      Thu, 16 May 2002 19:44:41 +0300
From:      Peter Pentchev <roam@ringlet.net>
To:        Attila Nagy <bra@fsn.hu>
Cc:        freebsd-hackers@FreeBSD.org
Subject:   Re: reboot your own jail ?
Message-ID:  <20020516194441.J349@straylight.oblivion.bg>
In-Reply-To: <Pine.LNX.4.44.0205161756580.26003-100000@scribble.fsn.hu>; from bra@fsn.hu on Thu, May 16, 2002 at 05:58:42PM %2B0200
References:  <20020516003127.I17484-100000@utility.clubscholarship.com> <20020516144159.C349@straylight.oblivion.bg> <Pine.LNX.4.44.0205161348501.26003-100000@scribble.fsn.hu> <20020516162219.E45898@mail.webmonster.de> <20020516180414.H349@straylight.oblivion.bg> <Pine.LNX.4.44.0205161706340.26003-100000@scribble.fsn.hu> <20020516184326.I349@straylight.oblivion.bg> <Pine.LNX.4.44.0205161756580.26003-100000@scribble.fsn.hu>

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On Thu, May 16, 2002 at 05:58:42PM +0200, Attila Nagy wrote:
> Hello,
>=20
> > Yes, for your particular kind of jail :)  And as a matter of fact, most
> > things could be started like that, indeed..  Seems I need to really wake
> > up and start thinking, and think myself away from the 'default' concept
> > of starting a full-fledged /bin/sh /etc/rc jail.
> Why would a /bin/sh needed for a nameserver? For helping crackers' life?
> :)
> I don't really like /bin/sh /etc/rc jails. And if I can, I often do jails
> on the 127/8 subnet with a simple redirect for that particular port. This
> also helps preventing the cracker to connect out from that jail.

Yes, this is indeed a very reasonable strategy for running jails.
However, all of this has kind of strayed from the original discussion;
that was why I said 'forget I said anything about supervise' :)

This whole discussion started after I mistakenly decided that
all jails are /bin/sh /etc/rc jails, and that the /etc/rc part
keeps running for as long as the jail is alive; this alone would
be the situation when supervising a jail would help 'rebooting'
the jail (shutting down all processes).  Since my basic premise
was wrong, supervise cannot be used to reboot a whole jail
(kill all the processes running within), I humbly apologize for
the wasted traffic :)

G'luck,
Peter

--=20
Peter Pentchev	roam@ringlet.net	roam@FreeBSD.org
PGP key:	http://people.FreeBSD.org/~roam/roam.key.asc
Key fingerprint	FDBA FD79 C26F 3C51 C95E  DF9E ED18 B68D 1619 4553
What would this sentence be like if pi were 3?

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