[Cialug] DSL v. Cable (Ankeny)

[Jerry Heiselman]

The modems do not use NAT at all.  They are setup, however, that if they see
a request destined for 192.168.100.1 that instead of passing it out the RF
port to the Mediacom network, they instead route that internally to display
the diagnostic pages.  The modems themselves are assigned private addresses
from a net-10 range for control by the cable operator, and the
computers/routers/etc... are assigned net-12 addresses for public use.

On 5/4/06, Dave Weis <djweis at internetsolver.com> wrote:
>
>
> On Thu, 4 May 2006, Jeffrey C. Ollie wrote:
> > Unless it's changed recently, the cable modems that are supplied by
> > Mediacom do not do NAT or firewalling or anything but bridge the traffic
> > between your computer and the Mediacom network.  The 192.168.x.x address
> > mentioned is used strictly for managing the cable modem.
>
> They started providing modems that have nat built in, along with some that
> have wireless. Imagine people wanting to use more than one computer or
> wireless on their connection. Of course, Qwest stopped providing the
> inexpensive wireless modem directly after that...
>
> > On Thu, 2006-05-04 at 10:18 -0500, Brandon Griffis wrote:
> >> Sorry, this is a little OT from the original question but the IP
> >> caught my eye.
> >>
> >> Am I to understand then that Mediacom does not provide their customers
> >> with a real IP address?  I know they're supposed to be DHCP and the IP
> >> changes every 3 days or so but 192.168.x.x is a private IP range and
> >> that would be a problem for me.
> >>
> >> Or is the modem a built in NATing router?  The modem gets a real IP
> >> but NATs it and sends out a connected IP. If this is the case can the
> >> NATing be turned off on the modem so the real IP is passed through?
> >> Or can you get just a Modem without a built in NATing router?
> >
> >
>
> --
> Dave Weis
> djweis at internetsolver.com
> http://www.internetsolver.com/
>
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