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Date: Thu, 17 Jul 2008 22:00:18 +0800
From: Eugene Grosbein <eugen@kuzbass.ru>
To: Chuck Swiger <cswiger@mac.com>
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Cc: stable@freebsd.org
Subject: Re: named.conf: query-source address
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On Wed, Jul 16, 2008 at 09:06:33PM -0700, Chuck Swiger wrote:

> >Isn't this common to have multiple aliases at an interface?
> >Sometimes only one of them should be used for all DNS traffic.
> 
> About the only common reason to set up multiple aliases on an  
> interface is when you're doing something like hosting multiple SSL  
> webservers on a single box which actually need to have distinct IPs as  
> a consequence.  Other than that, using public IPs for aliases is  
> usually wasteful of IP address space.  YMMV...

Think about multiple IP-based services (not HTTP "virtual" servers)
at one physical host that should use distinct IP addresses
for some reasons (local policy/billing/monitoring/etc.)

Eugene Grosbein