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RE: NMAP brings down Exchange Cluster?
From: "Siegle, Christopher J." <Christopher.Siegle () klgates com>
Date: Fri, 6 May 2011 09:10:01 -0400

I asked if we could test this against our secondary data center.  I'll share results if the test actually occurs.  Have 
you seen this happen before?  What did nmap do to create such a problem?

-----Original Message-----
From: nmap-dev-bounces () insecure org [mailto:nmap-dev-bounces () insecure org] On Behalf Of Michael Pattrick
Sent: Friday, May 06, 2011 8:58 AM
To: Siegle, Christopher J.
Cc: nmap-dev () insecure org
Subject: Re: NMAP brings down Exchange Cluster?

Both an interesting and testable assertion! Do these crashes occur mid scan? If so, you could be partially to 
blame(along with whoever configured such a delicate exchange installation). If not, try to give up scanning for a few 
weeks, Nmap is off the hook if more infrastructure problems occur.

The command line parameter you gave are quite benign, and shouldn't be capable of taking down any server. So I doubt 
Nmap it to blame. 

-M

On 2011-05-05, at 9:18 AM, "Siegle, Christopher J." <Christopher.Siegle () klgates com> wrote:

Hi nmappers.

Recently, my infrastructure peers have asserted that my use of nmap to scan our data center has caused various 
problems including bringing down FOLB clusters (Exchange servers).  Although I think this is highly unlikely, I 
wanted to get some feedback on this issue.

I am using the following command line switches:

-T3
-sS
-F
-O
-oX

sometimes d4

I appreciate your time.

==================================
Christopher J. Siegle "Chris"
Software Architect
K&L Gates, LLP
K&L Gates Center
210 Sixth Avenue
Pittsburgh, PA 15222-2613 (412) 355-8659 
mailto:christopher.siegle () klgates com

This electronic message contains information from the law firm of K&L Gates LLP.  The contents may be privileged and 
confidential and are intended for the use of the intended addressee(s) only.  If you are not an intended addressee, 
note that any disclosure, copying, distribution, or use of the contents of this message is prohibited.  If you have 
received this e-mail in error, please contact me at Christopher.Siegle () klgates com 


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