Re: USB or wireless and DSL

From: Mike Brown (mikebNOSPAM_at_NOSPAMassetforwarding.comNOSPAM)
Date: 07/28/04 

Date: Wed, 28 Jul 2004 10:02:57 -0500

"Steve Duff [MVP]" <ergodic@ergodic-systems.com> wrote in message
news:%23G4WPw1cEHA.400@TK2MSFTNGP10.phx.gbl...
> A NAT router connected to the DSL modem
> will "hide" the network behind it, and if properly
> configured it is not possible to probe anything
> at all on the LAN from the public Internet side.
>
> It then looks no different to the public side than
> a single computer with a firewall enabled,
> (except that the overall traffic profile will be
> somewhat different.)
>
> I don't know of any DSL providers that care
> one way or another, but of course you may well
> have one that does.
>
> Steve Duff, MCSE, MVP
> Ergodic Systems, Inc.

One exception to this rule is Insight Cable, whose cable modems communicate
closely with the NIC card and report the MAC address back to the cable
system. I don't know their current stance on this, but in 1999 when I first
signed up with them, I set up with only one computer. When I hooked up a
router a few months later, I got no connection and called customer service.
They told me that the wrong MAC address for the network adapter was reported
by the cable modem, and that if I wanted to hook up multiple computers, or
even change the MAC address of the computer (or NIC card) that would connect
to the modem, I would need to contact them beforehand.

Luckily, the router manufacturers came up with an easy fix, "MAC address
cloning" which simply changes the MAC address of the router WAN port to
match that of the NIC the modem was originally installed on. That way, the
router looks to the cable/DSL system to be the same as the NIC. 

-- 
Mike Brown
Asset Forwarding Corp.
EPA-compliant Electronics Recycling
DoD 5220.22-M Data Elimination
http://www.assetforwarding.com

Relevant Pages

  • Re: Comcast High Speed Internet and Router
    ... I knew it was a router issue but thought ... Their modem will only route to 1 ... I myself have a 25mbits connection - also with just one MAC address, but I have never had any problems ... Instead of a router, I bought a 8-port Belkin Gigabit cabled switch,, - connected it to the broadband modem - and voila - all machines are able to go online when and if i want to. ...
    (comp.sys.mac.apps)
  • Re: How to release IP address with airport express
    ... It's the MAC of the computer; if there is a router between the cable ... modem and the computers, it's the MAC of the cable modem. ... the MAC address of my Linksys when I first signed on (that was with Adelphia, ...
    (comp.sys.mac.system)
  • Re: Telewest Cable to a Router & 2 PCs?
    ... You need to clone the mac address for the card that is registered in the ... cable modem, however just power-down the modem for a few secs, that will ... reset the modem and allow you to register a different nic or pc. ... It is best to log-in to the router from a wired connection, ...
    (uk.telecom.broadband)
  • Re: Comcast and MAC addresses?
    ... I bought a new router and I had ... to clone the MAC addy from the NIC I first used two years ago. ... It's normal if you forgot to power cycle your cable modem. ... ask you for the MAC address of the replacement and "push" a new ...
    (comp.dcom.modems.cable)
  • Re: Linksys BEFSR41 weirdness
    ... >>> Is that same NIC card now attached to the router? ... >>> have two nodes on your LAN with duplicate MAC addresses. ...
    (comp.security.firewalls)
Quantcast