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Date: Thu, 14 Jul 2005 08:27:19 +0100
From: Alex Zbyslaw <xfb52@dial.pipex.com>
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To: Bob Hall <rjhjr@cox.net>
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Cc: freebsd-questions@freebsd.org
Subject: Re: DHCP assigned unregistered IP address
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Bob Hall wrote:

>Tonight, during a thunderstorm, I shutdown the household FBSD internet
>gateway. After the storm passed, I booted it up again, only to discover
>that during the bootup, my ISP's DHCP server had assigned me a new IP
>address. That wasn't a problem in itself, but the new address was
>192.168.100.11, an unregistered address.
>  
>
As suggested, the cable modem is probably the culprit.

If you do not need it's DHCP, can you talk to it by http?  Mine is 
192.168.100.1  and has a tickbox to turn DHCP on/off on its config 
page.  The trouble then is that you can have *no* IP address if you 
cable is down, but at least it's clear what's going on.

--Alex