December 2011
Beginner
552 pages
13h 30m
English
Content preview from Network Security First-Step, Second EditionBecome 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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Secure Shell (SSH)
SSH is used to log in to a remote computer system using port 22, much in the same way that Telnet (port 23) has been used in the past for the same purpose. The big difference between Telnet and SSH, however, is that SSH provides significantly enhanced security for your connection. SSH is a program/client that provides an encrypted communications path between two hosts over an untrusted, potentially insecure network such as the Internet. Therefore, it prevents users’ passwords and other sensitive data from being transmitted across the network in clear-text form. SSH helps solve one of the most important security problem on the Internet: hackers stealing or cracking passwords.
Used since 1995, SSH1 was designed to replace the ...
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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.