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Re: NMAP brings down Exchange Cluster?
From: Hani Benhabiles <kroosec () gmail com>
Date: Fri, 6 May 2011 14:18:16 +0100

It would be also interesting if you could provide some packet capture or
check it yourself and tell more about at what parts of the scan the problems
do occur.

--Hani

On Fri, May 6, 2011 at 2:10 PM, Siegle, Christopher J. <
Christopher.Siegle () klgates com> wrote:

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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