Re: Identify rogue adsl modems routers in the network

[Steve Friedl <steve () unixwiz net>]

On Mon, May 26, 2008 at 03:40:53PM -0400, kevin horvath wrote:
> use a wardialer such as phonesweep.  Sweep the phone numbers that are
> allocated to you and if you get a carier signal then you need to check
> it out.  Good luck.

DSL Modems don't offer a carrier to incoming phone calls; it's a separate
signal overlaid upon the phone line, and telco users should not be able
to detect that DSL is riding on the same circuit.

Steve

> On Mon, May 26, 2008 at 12:25 PM, t35tman <t35tman () gmail com> wrote:
> > Hi all,
> >
> > Had a weired requirement recently.
> > I was wondering if there is any way to detect an adsl modem/router connected
> > to a phone line.
> >
> > The scenario being able to trace the adsl modem/router internally from
> > within the corporate network or externally from the ISP network.
> >
> > The only option I see is to check with the ISP ... any suggestions ?
> >
> > Thanks and Regards

-- 
Stephen J Friedl | Security Consultant |  UNIX Wizard  |   +1 714 544-6561
www.unixwiz.net  | Tustin, Calif. USA  | Microsoft MVP | steve () unixwiz net

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