Hi All,

Can I specify multiple IP interfaces and assign IP’s to them using jail.conf?
I have jails with IPv4/IPv6 addresses on multiple physical interfaces, as well 
as assigning a loopback.

I have not found answers in the respective man pages or digging online.

I’m finally starting to poke around to start using the impressively simple 
jail.conf subsystem to manage jails.  I have been managing jails with simple 
custom start scripts since 99’, and custom devfs rulesets since ~2006, so 
jail.conf(1) and jail_set(2) are a big welcome change for me- really awesome 
and clean :)

--
Additional detail to clarify my loopback use:
In general, I always assign each jail it’s own a loopback IP somewhere in the 
RFC5735 specified range, 127.0.0.0/8 - (simply saving 127.0.0.1 for the jailing 
host), and then I simply set localhost to point at it’s IP in /etc/hosts for 
the jail.  On the host, I simply add the IP alias to lo0 like any other 
interface.
This is often overlooked in common jailing practice, but often eliminates 
complexity and confusion for many userland daemons.  For full Virtual Server 
applications, loopback is simply dotting the i’s and crossing the t’s.

I can see how localhost would be challenging to automate for easy jail.conf 
configuration, mostly, in picking a loopback IP for the jail and not letting 
that get messy- etc…

Thanks in advance for any info!

Best,
.ike


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