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From: Mark Felder <feld@feld.me>
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Subject: Re: Changes in Jails from FreeBSD 6 to FreeBSD 9 -- particularly,
 networking and routing
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Do I understand this right?


Working in FreeBSD 6.x:

interface em0: 1.2.3.4/24  <-- public IP, host only
            192.168.1.1/24  <-- private IP, host only
            192.168.1.2/24  <-- Jail #1
            192.168.1.3/24  <-- Jail #2


With this configuration you had no problems accessing the internet from  
the jails.

Is this correct? This seems bizarre; this should only be possible if  
you're doing NAT somewhere in there and that is not possible with Jails v1  
(which share a network stack) and is only possible in Jails v2 (vnet).