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Date: Fri, 11 Dec 2015 23:10:32 +0100
From: Miroslav Lachman <000.fbsd@quip.cz>
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To: Rob J <rjohanne@gmail.com>, freebsd-jail@freebsd.org
Subject: Re: ppp has NOJAIL keyword in its startup script
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Rob J wrote on 12/11/2015 20:26:
> Hello,
> I was wondering why my ppp configuration wasn't starting in a jail,
> until I looked at the /etc/rc.d/ppp script, which contains the keyword
> NOJAIL.
>
> So, I cannot start ppp (for my dsl connection) in a jail, and the
> question is why?  Are there security, or other reasons why you can't
> run ppp in a jail?

You cannot manage network interfaces, IP addresses and routing tables in 
jail with default system settings. (for security reason)

Miroslav Lachman