putting jails on public addresses

James Gritton jamie at gritton.org
Thu Aug 21 03:16:21 UTC 2014

On 8/20/2014 5:20 PM, Littlefield, Tyler wrote:
> Hello:
> I'd really like to put a couple of jails on publically accessible IP 
> addresses. I have 5 that my provider has assigned to me. Could anyone 
> possibly shed
> some light on how to do this? I know of epairs, but I'm not sure 
> exactly how this works: does each interface (a and b) get an address? 
> I presume one would
> be and the other would be x.x.x.x (where x.x.x.x is the 
> public address)? Which one should i set the gateway on?
> Thanks a lot for the help,

You shouldn't need to mess with epair for most jails.  Just specify the 
jails' addresses (ip4.addr=x.x.x.x) in your jail.conf, and be sure to 
have an "interface=foo0" global line.  The simplest jail setup is one 
using publicly available addresses on a single interface, which sounds 
like what you have.

- Jamie

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