RE: War Dial on my PBX

["Cotter, Joe" <jcotter () everestusa com>]

I would think the first thing to do is contact your local telco. You
should work with them to determine who this is. They should be able to
figure out who is initiating this attack (ANI or otherwise). It could be
as harmless as someone having a misconfigured telemarketing system or a
fax spammer looking for places to send junk. But I would START with your
local telco.

-Joe

-----Original Message-----
From: David Barnett [mailto:dbarn064 () earthlink net] 
Sent: Tuesday, June 24, 2003 5:41 PM
To: incidents () securityfocus com
Subject: War Dial on my PBX



My company's PBX system (Nortel Meridien) is getting hammered. All our 

DIDs are getting hit. Aside from disabling trunk to trunk, what could I
do 

to help mitigate this problem. Another office last year was hit and 

through the voice mail system someone was able to make $25,000 worth of 

calls in a day. This was another system though.

Any help is much appreciated.




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Attend the Black Hat Briefings & Training, July 28 - 31 in Las Vegas, the
world's premier technical IT security event! 10 tracks, 15 training sessions,
1,800 delegates from 30 nations including all of the top experts, from CSO's to
"underground" security specialists.  See for yourself what the buzz is about!
Early-bird registration ends July 3.  This event will sell out. www.blackhat.com
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