June 2016
Intermediate to advanced
152 pages
3h 30m
English
Content preview from Linux Networking 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,
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.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.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.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.
Identifying services
Another useful piece of functionality that nmap provides is the ability to identify services by attempting to grab application banners or issue various types of known requests and determine the service based upon how it responds.
How to do it…
Use –sV to probe for service/version information:
$ nmap 10.0.0.10 -sV Starting Nmap 6.40 ( http://nmap.org ) at 2016-05-08 16:15 EDT Nmap scan report for 10.0.0.10 Host is up (0.0016s latency). Not shown: 995 closed ports PORT STATE SERVICE VERSION 22/tcp open ssh (protocol 2.0) 25/tcp open smtp Postfix smtpd 53/tcp open domain 80/tcp open http Apache httpd 2.4.7 ((Ubuntu)) 111/tcp open rpcbind 2-4 (RPC #100000) 1 service unrecognized despite returning data. If you know the service/version, ...
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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.