[prev in list] [next in list] [prev in thread] [next in thread] 

List:       nmap-hackers
Subject:    Idle scanning paper released
From:       Fyodor <fyodor () insecure ! org>
Date:       2002-09-16 6:30:05
[Download RAW message or body]

Hello everyone,

One of the coolest yet still relatively obscure features of Nmap is
the Idle scan (-sI).  Not only does this allow for a completely blind
portscan (no packets sent to the target from your real IP), but it can
even allow you to bypass packet filters in certain circumstances.  I
think one reason this has not taken off is that documentation is
pretty scarce.  So I have written an informal paper describing Idle
scanning as well as several other exploits based on predictable IPID
sequence numbers.  It includes real-life examples as well as a section
on defending yourself from these techniques.  The paper is at
http://www.insecure.org/nmap/idlescan.html and feedback is welcome.

If you want to test Idle scanning functionality, I recommend Nmap
3.10ALPHA3 (released an hour ago) as it fixes several bugs and
improves the algorithm slightly.

Cheers,
Fyodor

--------------------------------------------------
For help using this (nmap-hackers) mailing list, send a blank email to 
nmap-hackers-help@insecure.org . List run by ezmlm-idx (www.ezmlm.org).

[prev in list] [next in list] [prev in thread] [next in thread]