[ale] Modem/router config for Comcast

[Matt Rutherford]

Most residential cable modems (the ones without a built-in wifi) are in
bridge/pass-through mode by default - what modem manufacturer and model are
you using? The cable modem should pass a public IP to the router, which can
then handle all the NATing. While cable modems answer to a 'local' IP
address (Motorolas, for example, will reply as 192.168.100.1 even when
you're not getting DHCP from the cable system), they generally do not NAT
by default.

-Matt R


On Sun, Jul 29, 2012 at 2:47 PM, Justin Goldberg <justgold79 at gmail.com>wrote:

> Yes. You'll see the modem but you won't be able to connect to the internet.
>
> On 7/29/12, Pete Hardie <pete.hardie at gmail.com> wrote:
> > So if my router is getting IP x.y.z.a from the cable modem, I just set
> > a computer IP to x.y.z.(a+1) and I can see the modem?
> >
> > Pete Hardie
> > --------
> > Better Living Through Bitmaps
> >
> >
> > On Sun, Jul 29, 2012 at 2:24 PM, Justin Goldberg <justgold79 at gmail.com>
> > wrote:
> >> Depending on the model you can still access the modem in bridged mode
> >> by staticing your computer's ip to be on its lan subnet.
> >>
> >> On 7/29/12, Pete Hardie <pete.hardie at gmail.com> wrote:
> >>> I'm using the cable modem from Comcast, but have them set it to bridge
> >>> mode.  My Linksys is set to get its IP (network-facing) via DHCP, but
> >>> I have my desktop as internal DHCP server for my internal network.  I
> >>> am not able to access the cable modem admin interface when its in
> >>> bridge mode
> >>>
> >>>
> >>> Pete Hardie
> >>> --------
> >>> Better Living Through Bitmaps
> >>>
> >>>
> >>> On Sun, Jul 29, 2012 at 1:35 PM, Jim Lynch
> >>> <ale_nospam at fayettedigital.com> wrote:
> >>>> I have purchased a modem and router to replace the Comcast supplied
> >>>> equipment and am wondering how to configure same.  I read in a recent
> >>>> thread about asking the company to configure the modem as a
> >>>> pass-through
> >>>> device.  That's what I'm currently doing with the existing DSL
> service,
> >>>> letting the router do the PPPoE authentication.  Since I haven't
> gotten
> >>>> any user/pw info I'm making a wild guess that cable modems don't use
> >>>> PPPoE??   This is a residential installation.
> >>>>
> >>>> 1. So the questions are, can I get the drones supporting a residential
> >>>> installation to configure my modem as a pass-through?
> >>>> If I do, what's the connection type?
> >>>> Is there an authentication mechanism I'll need a user/pass for?
> >>>>
> >>>> 2. Or am I going to have to leave the modem alone and  get an IP from
> >>>> the modem via DHCP?
> >>>>
> >>>> I'd rather not have two DHCP servers between me and the network, if
> >>>> that's possible.
> >>>>
> >>>> I know how DSL works but I haven't had any experience with cable to
> >>>> date.  I googled for info but all I could come up with was how to
> >>>> accomplish #2.
> >>>>
> >>>> Thanks,
> >>>> Jim.
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Ale mailing list
> >>>> Ale at ale.org
> >>>> http://mail.ale.org/mailman/listinfo/ale
> >>>> See JOBS, ANNOUNCE and SCHOOLS lists at
> >>>> http://mail.ale.org/mailman/listinfo
> >>> _______________________________________________
> >>> Ale mailing list
> >>> Ale at ale.org
> >>> http://mail.ale.org/mailman/listinfo/ale
> >>> See JOBS, ANNOUNCE and SCHOOLS lists at
> >>> http://mail.ale.org/mailman/listinfo
> >>>
> >>
> >>
> >> --
> >> Looking for better conference calls? Try Uberconference:
> >>
> >> http://uberconference.com/zevcxTpX
> >> _______________________________________________
> >> Ale mailing list
> >> Ale at ale.org
> >> http://mail.ale.org/mailman/listinfo/ale
> >> See JOBS, ANNOUNCE and SCHOOLS lists at
> >> http://mail.ale.org/mailman/listinfo
> >
>
>
> --
> Looking for better conference calls? Try Uberconference:
>
> http://uberconference.com/zevcxTpX
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.ale.org/pipermail/ale/attachments/20120729/a2540e27/attachment.html