November 2004
Intermediate to advanced
448 pages
13h 56m
English
Content preview from Securing Windows Server 2003Become 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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Chapter 7. Authentication
As you learned in Chapter 2, authentication is the process by which a computer validates the identity of a user or another computer. Authentication is a core functionality of any network operating system, including Windows Server 2003. Windows Server 2003 actually supports several complete authentication protocols: LAN Manager, NT LAN Manager Versions 1 and 2, and Kerberos. In this chapter, I’ll introduce you to the two main types of protocols, explain how they’re used and configured, and discuss why you might want to use one over the other.
LAN Manager and NTLM
LAN Manager, or LM, is an authentication protocol designed (at its time) to maximize password security in a Windows-based environment. The LM protocol was first used in Microsoft’s LAN Manager product a very long time ago and is still the authentication protocol of choice for older operating systems, such as Windows 95 and Windows NT 3.51 and earlier. Later, when Windows NT was introduced, LM was enhanced and renamed the NTLM authentication protocol. Although NTLM has been around for a long time, it’s still a basically good authentication protocol, and it is the native network authentication protocol of Windows NT 4.0 and earlier operating systems.
A Brief History of LM and NTLM
LM was introduced, as you might expect, in Microsoft’s LAN Manager product of the late 1980s, which evolved over time into Windows NT. It is very similar to NTLM and is supported in most Microsoft products, including Windows ...
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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.