/dev/random in jails

Tech Valley Internet - Tony Kivits tony at techvalley.ca
Thu Jul 19 03:34:19 UTC 2007

At 07:32 PM 7/18/2007, Christopher Cowart wrote:
>On Wed, Jul 18, 2007 at 06:30:50PM -0700, Tech Valley Internet - 
>Tony Kivits wrote:
> > I am attempting to run portions (if not all) of the software called
> > HSphere inside of jailed subsystems of FreeBSD.  I am able to create
> > the jails no problem but the devices /dev/random and /dev/urandom are
> > not created automatically in the jail despite the fact that a handful
> > of other devices are mounted correctly when the jail is created.
> >
> > Is there a specific reason for these devices not being created in a
> > jail or is there a way to create these devices so that they will be
> > available inside a jail?
>We run bind instances in FreeBSD jails. This is how we get /dev/random:
>| # /etc/devfs.rules:
>| [devfsrules_thin_jail=100]
>| add include $devfsrules_hide_all
>| add include $devfsrules_unhide_basic
>| # /etc/rc.conf:
>| jail_cachingdns_devfs_enable="YES"
>| jail_cachingdns_devfs_ruleset="devfsrules_thin_jail"
>Chris Cowart
>Lead Systems Administrator
>Network & Infrastructure Services, RSSP-IT
>UC Berkeley

Thanks Chris,

So if my jail is called "cp", the only thing that I would have to 
change from your scripts would be replace to replace "cachingdns" with "cp"?


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