November 2012
Intermediate to advanced
318 pages
6h 36m
English
Content preview from Nmap 6: Network Exploration and Security Auditing CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Collecting signatures of web servers
Nmap is a de facto tool for information gathering, and the variety of tasks that can be done with the Nmap Scripting Engine is simply remarkable. The popular service "ShodanHQ" (http://shodanhq.com) offers a database of HTTP banners, which is useful for analyzing the impact of vulnerabilities. Its users can find out the number of devices that are online, by country, which are identified by their service banners. ShodanHQ uses its own built-in house tools to gather its data, but Nmap is also perfect for this task.
In the following recipe, we will see how to scan indefinitely for web servers, and collect their HTTP headers by using Nmap.
How to do it...
Open your terminal and enter the following command:
$ nmap ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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