Some questions about jails on FreeBSD9.0-RC1

carlopmart carlopmart at
Wed Oct 26 07:53:15 UTC 2011

On 10/26/2011 03:12 AM, Patrick Lamaiziere wrote:
> Le Tue, 25 Oct 2011 22:52:55 +0200,
> carlopmart<carlopmart at>  a écrit :
> Hello,
>>    I have installed one FreeBSD 9.0-RC1 host to run different services
>> (dns, smtp and www only) using jails. This host has two physical
>> nics: em0 and em1. em0 is assigned to pyhiscal host, and I would like
>> to assign em1 to jails. But em0 and em1 are on different networks:
>> em0 is on and em1 in
>>    I have setup one jail using ezjail. My first surprise is that
>> ezjail only installs -RELEASE versions and not RC versions. Ok, I
>> supouse that it is normal. But my first question is: can I install a
>> FreeBSD 8.2 jail under a FreeBSD 9.0 host??
> You may run 8.2 installed ports on 9.0 by using the port
> /usr/ports/misc/compat8x/
> But I suggest to upgrade the port ASAP.
>>    And the real question: How do I need to configure network under
>> this jail to access it? I have configured ifconfig param for em1 on
>> host's rc.conf, but what about the default route under this jail?? I
>> thought to use pf rules, but I am not sure.
> jail enforces the use of the jail IP address in the jail, but that's
> all. Just enable routing on the host.

But, that is not possible. Between host and jail exists a firewall ... I 
can't do simple routing with the host. Maybe a posible solution is to 
use policy source routing ??

CL Martinez
carlopmart {at} gmail {d0t} com

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