RE: Company being War Dialed

[nospam () none net]

Tracing is the incorrect term. What you meant to say was it would be more
difficult to identify the source number. You dont trace a call with ANI.
Alot of your ability to identify the source number is determined by what
type of lines you own. PRI's provide source numbers using the d channel.
T1's do not use a d-channel and you would need to rely on SMDR records,
which is transfered after the call, analog doesnt pass the number (with
the exception of Caller ID, which is useless. ANI is a service that can
be requested to provide numbers when you normally dont have the
capability to get them.
Hope this helps clear up a few things.


On Mon, 21 Apr 2003 James.Jackson () broadwing com wrote:

> They may be calling through a provider that is not passing on the ANI
> which would make tracing the call more difficult.
>
> James
>
> -----Original Message-----
> From: public list [mailto:nospam () none net]
> Sent: Monday, April 21, 2003 1:06 AM
> Cc: incidents () securityfocus com
> Subject: Re: Company being War Dialed
>
>
>
> If you have PRI lines you should have their numbers.
> If you are using analog or t1's you rely on the phone company. In which
> case you may consider ANI.
>
> A good way to stop wardialing, telco firewalls.
> www.securelogix.com
>
> On Thu, 17 Apr 2003, Fred Kreitzberg wrote:
>
> > The war dialing started last night and has continued throught the day.
> They are being very noisy, staying on the line with a steady beep, beep,
> beep long enough to leave a voice message.  The calling has occcured on
> two different prefixes so I am concerned my company is being targeted.
> > Our local service provider's security and fraud team has not been able
> to identify a single source of the calls.
> > We have recently done our own War-dail and feel we know all our modems
> are secured correctly.
> > Any thoughts on additional steps I should be taking?
> >
> > thanks
> > Phred
> > --
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Travis Good, CISSP

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