Re: [PLUG] Comcast Cable modem & DHCP

[Lee Marzke <lee@marzke.net>]

Sometimes the MAC address of the Linksys needs to be spoofed by the 
replacement, or wait
a few hours,  or call Comcast and tell them you've replaced your router.

This was years ago,  I don't know if they still track/authenticate and 
allow only one MAC
address today or not.

If you want even more security, VPN, TC, and you have a PC available ,  
check out my talk on the
open-source Endian UTM:

http://plone.4aero.com/Members/lmarzke/plug_utm/index/presentation_view

Lee

On 12/11/2010 09:08 AM, Julien Vehent wrote:
> Hello Plug,
>
> I just arrived in Philly (and thus joined the plug mailing list) and 
> I'm discovering comcast cable equipment (big motorola modem with one 
> ethernet plug).
>
> I would like to replace the old linksys we are using in the house with 
> a Debian box connected to the modem (I want netfilter and traffic 
> control).
> The linksys is getting it's IP in DHCP mode already. From what I see, 
> the lease is 3 days long.
>
> I thought a simple "dhclient eth1", the interface where the cable 
> modem is plugged in, would do the job, but it seems that it's refusing 
> to give my Debian a lease...
>
> Here and there I read that a specific hostname should be provided by 
> the client, but AFAIK there is no such setting on the actual linksys.
>
> I'm from france, and never used comcast or a motorola cable modem 
> before. This one is pretty old (I'd say 2004/2005) but still working 
> fine so replacing it is not an option. Also, I sniffed the DORA from 
> the linksys to the modem and didn't find anything specific in the 
> packets.
>
> So, I seek for your help. Is there any comcast black magic ritual 
> necessary to make this work ? Anybody using a linux box behind a cable 
> modem with dhcp ?
>
> Thanks,
> Julien
>
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--
"Between subtle shading and the absence of light lies the nuance of iqlusion..."  - Kryptos

Lee Marzke,     lee@marzke.net

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