September 23, 2007
Hacking Nmap: Using Nmap to Calculate Network Response Time
digg_url = 'http://www.digg.com/software/Hacking_Nmap_Using_Nmap_to_Calculate_Network_Response_Time'; I usually don't cross-post information about articles my other sites, but this one has some information that might be useful for network professionals. I've just posted an article that shows how to use Nmap to get... Read more...September 03, 2007
It's flattering. No, really. Ok, not really.
I'd like to thank everyone for their "heads-up" email messages regarding an article that Slashdot.org featured recently. I tend to agree with most of you, there are shocking similarities to Kirby "Kev" Tucker's article and my Nmap ebook. Shocking, I... Read more...July 15, 2007
The Professor Messer Webinar Series - Nmap Summer School
The Professor Messer webinar series continues with our online Nmap Summer School web conference. This live webinar is scheduled for Thursday, July 19 at 9 PM Eastern Time, and everyone is invited! http://www.ProfessorMesser.com/webinar/ In this month’s webinar, we’ll show you... Read more...March 15, 2007
Another Free Nmap Webinar!
The Professor Messer webinar series continues with our latest live online training session, “Introduction to Nmap.” We’ve scheduled the webinar for Thursday, April 5th at 9 PM Eastern Time, and we’re planning to cover a lot of great Nmap content.... Read more...February 08, 2007
Join us for a free Nmap webinar!
On Thursday, February 22nd at 8pm Eastern Time, we’re hosting a webinar titled “Nmap: What You Need to Know Now.” The webinar will be one hour of free Nmap training, where we'll update you on the latest Nmap features, demonstrate... Read more...January 29, 2007
The Countown is Underway!
One of my readers sent me an email last week and asked where I’d been, so I thought I’d post an update. I’ve not posted anything on Network Uptime lately because we’ve been extremely busy with a new Nmap-related project.... Read more...July 27, 2006
Will an nmap Operating System scan work through a firewall?
From the mailbag, Jesse C. writes:
I have been assigned a project within my organization to perform OS Fingerprinting on subnets. What I find is that end-users that do not use Windows Firewall (have it disabled or not installed), I am able to detect their OS with no problem. The problem lies that many new users have Windows SP2 Firewall enabled which are limiting my scan results. I am using the following nmap command in Linux. (# nmap -sS -O -PI 192.168.0.1/24)
What should I do to accurately perform an OS Fingerprint scan on my subnet? If not 100% accurate, what nmap commands would your suggest?
Read more...July 23, 2006
The Secret of the Slow Scan

I've uploaded some new content for my nmappers, and you're going to love my latest "mystery" movie!
June 02, 2006
Are you in the group?
I've gotten some great feedback from the recent nmap tips and tricks video. Keep those comments flowing! There's also an important group of nmap enthusiasts that have purchased my book, Secrets of Network Cartography: A Comprehensive Guide to nmap. To... Read more...May 31, 2006
Free Video from NetworkUptime.com!
I've got a special bonus for nmap enthusiasts - a free video of tips and tricks!
Read more...
