November 2012
Intermediate to advanced
318 pages
6h 36m
English
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Discovering hosts with IP protocol ping scans
Ping sweeps are very important for host discovery. System administrators and penetration testers use them to determine which hosts are online and responding. Nmap implements several ping scanning techniques, including one called an IP protocol ping scan. This technique tries sending different packets using different IP protocols, hoping to get a response indicating that a host is online.
This recipe describes how to perform IP protocol ping scans.
How to do it...
Open your terminal and enter the following command:
# nmap -sP -PO scanme.nmap.org
If the host responded to any of the requests, you should see something like this:
# nmap -sP -PO scanme.nmap.org Nmap scan report for scanme.nmap.org (74.207.244.221) ...
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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.
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.