Chroot / Jail Service (Apache, Postfix, Squid)

HI everyone

I am started building my own Firewall / Router. I'm planing to run applications like Squid Proxy etc on it. I'm am new to BSD so I don't know the proper way to do this. I'm only experienced with Linux (Ubuntu / Centos). For better security I want to Chroot every service. As far as I understand every Jail has it's own IP. But I don't want this. I just want to lock down every service. So i think I need to use chroot.

Is that right ?

And how would I do this ?

-- sorry for my crappy english
 
I've already read this.

and installing software is not my problem.

So it seems, that a jail requires an IP Adress.
So for my case i need to use chroot.

But how do i set this up ?
 
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