FYI you should be able to go to http://192.168.100.1 to get to the cable 
modem interface, where you should be able to see what sort of error it 
is getting. At least that's the IP that worked for me both when I had a 
Cox-provided motorola surfboard modem, as well as with the Linksys one I 
have now.

-Charles

Dan Lund wrote:
> Not always true, I had the issue when I tested the line with a direct
> network connection to the cox cable modem.  I saw it was working,
> getting dhcp just fine, and I was able to get a web page without a
> problem.  I then unplugged everything, rearranged wires to not be so
> ugly and balled up like they were, plugged the cable modem in and
> watched it initialize and sync with cox.  I plugged my Belkin wireless
> router into it (yes, into the right port :) ) and once I got a dhcp
> address internally on my laptop, I got a cox page everytime I went
> somewhere, saying to contact customer service.  Needless to say, when
> I called tech support, they were very terse and told me they don't
> support anything other than a single computer connected to their
> network.  When they blanked the mac on their end and they told me to
> "hook the computer up the right way", I took a funky little laptop
> that barely booted and used that for the initial MAC sequencing.  Once
> we disconnected, I cloned that MAC onto the wireless router as the
> internet mac, and threw the laptop away.  No problem since.
>
> --Dan
>
> On Wed, May 14, 2008 at 8:37 PM, Jon M. Hanson <jon@the-hansons-az.net> wrote:
>   
>> You don't have to call Cox if your MAC address has changed. You just have to
>> unplug the cable modem's power for a minute or so and plug it back in.
>> ---
>> Jon M. Hanson (N7ZVJ)
>> Weblog: http://the-hansons-az.net/wordpress/
>> Homepage: http://the-hansons-az.net/
>> Jabber IM: jon@the-hansons-az.net
>>
>>
>>     
>
>
>