July 23, 2006

The Secret of the Slow Scan

I've uploaded some new content for my nmapper members, and you're going to love my latest "mystery" movie. It's the feel good hit of the moment!

I was traveling this week, and I found myself doing some late-night research in my hotel room for an upcoming nmap project. I wanted to do a quick scan, so I picked a device on my local subnet and performed a default nmap scan. I was expecting the results in a few seconds, but I was surprised when I didn't get a response back after ten seconds had passed.

Ten seconds turned to twenty seconds, and twenty seconds turned into a full minute. I was shocked when it took a FIVE MINUTES for nmap to complete a simple SYN scan to a local device! Why was nmap taking so long to perform this relatively simple scan? Was nmap broken? I was beginning to wish Ithat hadn't left the confines of the Professor Messer Lab.

In the end, the results were very interesting! I performed some packet captures, and you may be surprised at what I found!

If you're a member of my nmapper list, then you already have the link to the movie. If you aren't a free member of the nmappers list, what are you waiting for? This free movie, the associated packet trace files and much more is waiting just beyond this link:


Enjoy the movie, and leave a comment to let me know what you think!

Posted by james_messer at July 23, 2006 02:53 AM


Thanks for sharing...

Posted by: chuck at July 24, 2006 09:16 PM

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