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From: Artem Kuchin <artem@artem.ru>
Subject: Internal local ip address for host only
Message-ID: <56879844.1030901@artem.ru>
Date: Sat, 2 Jan 2016 12:28:36 +0300
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I have a didicated server inside provider's network.
I have igb0 interface
Now, i need some 10.0.0.x ups for jails, so i configure aliases on igb0 
interface

         inet 10.0.0.1 netmask 0xffffffff broadcast 10.0.0.1
         inet 10.0.0.2 netmask 0xffffffff broadcast 10.0.0.2
         inet 10.0.0.3 netmask 0xffffffff broadcast 10.0.0.3

But this is wrong, because there can be another server with the same ips 
in the local network and
in fact during boot i get

Jan  1 16:37:41 omni kernel: arp: 00:25:90:47:4f:9c is using my IP 
address 10.0.0.1 on igb0!

So, how i can i make perfectly virtual nic visible only inside my host?

Artem