Re: [PLUG] Comcast Cable modem & DHCP

[Julien Vehent <julien@linuxwall.info>]

The linksys was bought independently from comcast, and comcast should 
not be aware of its MAC, that's why I was puzzled by the DHCP 
restriction. Turns out it was only a matter of restarting the modem.

I'm setting this box as a firewall/QoS primarily. If needed, I'll set up 
an openvpn entry point and a vsftpd server but that's not priority.

btw: I don't know if there are many TC fanboys around here. I'm one, and 
would love to exchange on the subject.
I wrote this ~20 pages articles:
http://www.gnulinuxmag.com/index.php/2010/04/23/gnulinux-magazine-n%C2%B0127-mai-2010-chez-votre-marchand-de-journaux
a few months ago and I'm currently translating it into english (will be 
made available under CC).

Julien

On 12/11/2010 09:37 AM, Lee Marzke wrote:
> 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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> > Announcements -
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>
>
>
>
> ___________________________________________________________________________
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> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
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___________________________________________________________________________
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Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
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