Multiple ethernets on one cable modem

[Chuck Young]

Exactly.  *If* there is a multi-MAC system, single-MAC folks would
apparently need to order it and have it configured by M1X or something.
You can't just plug stuff in and {BAM} have multiple routable IP addresses 
at home.

Since the speed is probably the same, a firewall with NAT provides both
security and access for multiple machines without additional cost or
reconfiguration headaches.  That's what I do.  Many birds - one stone.

Could not agree more.  I just wish I could spend the money for a real ISP
like connection at home and not feel it  ;-)  Someday soon we'll all laugh
that we had to worry about the "server police" and being forced to do NAT.

Chuck Young
GTE Internetworking

On Wed, 1 Dec 1999, Jerry Feldman {75562} wrote:

> Date: Wed, 01 Dec 1999 11:40:29 -0500
> From: Jerry Feldman {75562} <gzf at gbrmail.msd.ray.com>
> Cc: "'discuss at blu.org'" <discuss at Blu.Org>
> Subject: Re: FW: [BLU] Re: Where is rlz.ne.mediaone.net?
> 
> Niall Kavanagh wrote:
> 
> > Since it's just an ethernet network, there's nothing to stop you from
> > plugging the cable modem into the uplink port of a hub, 
> That won't work on M1X. The cable modem knows about your NIC's MAC address,
> and will not pass packets from other machines on your internal network. Even
> worse. If you have 2 systems on a hub, both running a dhcp client, it is
> possible that the wrong system will obtain the ip address. This used to
> happen occasionally on my thin wire network. It was easy to fix. I am
> assuming that the M1X feature that you are referrring to is where the cable
> modem is capable of storing more than one MAC address. When a cable modem
> boots up, it gets information downloaded from M1X, and is actually assigned
> its own ip address. It appears that they limit you to 3 systems connected
> through a hub at $14.95/Mo for each of the 2 additional ones. Currently, my
> wife and I have 2 separate cable modems, mainly because my system is used
> for development and might be unstable. If I were doing it today, I would use
> a dedicated firewall to connect to the cable modem. There are some very good
> personal firewall systems you can buy for a a few hundred bucks. Or you can
> set up a Linux or BSD system yourself. Then you can have as many systems as
> you want inside the firewall. Of course there are bandwidth considerations
> with a single cable modem approach.  
> 
> -- 
> Jerry Feldman (HP On-Site Consultant) http://gbrweb.msd.ray.com/~gzf/
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