May 2015
Beginner to intermediate
118 pages
2h 29m
English
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Triggering functions – the rule
The rule or portrule section of an Nmap script determines when the action should take place (which we'll cover in the next section). It's important to define this clearly so that we are confident that our script will run every time we need it to (based on port number and version). There are two ways to accomplish this type of rule: standard portrule documentation, and a helper library built in the NSE called shortport.
Defining a rule is actually very simple, depending on what we're looking for. In the case of our robots.txt detection script (aptly named robots.nse), we just want to trigger on port 80 to see if robots.txt exists.
If we were writing a production script, rather than a proof of concept, it would probably ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.