Re: nmap results

[Brian Smith-Sweeney <bsmithsweeney () nyu edu>]

Mohamed Abdel Kader wrote:
> Hello All,
> I have recently been doing some scans and in some cases nmap returns many
> ports to be open. the weird thing is that the ports are sequential.
> i know many of you might be tempted to say its a honeypot but i know for a
> fact its not. does anyone know why does this happen and how? 
>
> Thanks in advance.

Need more information.  What type of nmap scan are you running (syn, 
connect, UDP, etc.)?  What OS are you running it from?  Can you give 
examples of some of the targets?   What type of gear is between you and 
the targets?  Have you run a sniffer on at least the source side of the 
scan, and preferably the destination side as well (assuming you have 
permission to be pen-testing these networks)?  If not, do that.  If so, 
what are the results?  Does what your seeing match up with what nmap is 
reporting?

The $10k question you need to be asking yourself is "what causes nmap to 
report a port as open for the type of scan I'm running?"  Then you can 
try to figure out why that condition may be occurring in this situation. 
 Answers to the questions above should help you figure that out.

Cheers,
Brian

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Brian Smith-Sweeney
Sr. Network Security Analyst
ITS Technology Security Services, New York University
bsmithsweeney () nyu edu
http://www.nyu.edu/its/security
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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