On Wed, 29 Jan 2014 06:49:01 -0700
James Gritton <ja...@freebsd.org> wrote:

> On 1/29/2014 6:43 AM, Gleb Smirnoff wrote:

> > Doesn't this allow to easily unjail self? :)

> It does.  I included a warning in jail.8 that this will pretty much
> undo jail security.  There are still reasons some may want to do this,
> but it's definitely not for everyone or even most people.

It only "unjails" (= basically the same security level as the jail-host
with the added benefit of the flexibility of a jail like easy moving
from one system to another) the jail which has this flag set. All other
jails without the flag can not "escape" to the host.

I also have to add that just setting this flag does not give access to
the host, you also have to configure a non-default devfs rule for this
jail (to have the devices appear in the jail).

Bye,
Alexander.

-- 
http://www.Leidinger.net    Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org       netchild @ FreeBSD.org  : PGP ID = 72077137
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