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Re: Cable Modems Need Open Ports?
From: Lance Reck <lance.reck () sun com>
Date: 04 Nov 2002 08:31:43 -0700

I'm not sure about Comcast, but AT&T does a MAC address pull or check of
the device attached to the cable modem. This check is done quite often
for some reason. I suspect the if the modem cant grab a MAC addr then
you will not get IP connectivity.


On Fri, 2002-11-01 at 10:52, Mike Marcus wrote:
I was "playing" with setting on my router that is connected to a cable modem
(Comcast is the ISP).  After blocking incoming (from wan) UDP and TCP ports
53 and 59 the router lost its external IP.  Any ideas?



Lance Reck,
Enterprise Monitoring and Management
Sun Microsystems IT Operations
voice: 303-272-9915 or X79916
page:  page-lance () skytel com

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