1 Host Hardening Chapter 6 Copyright 2003 Prentice-Hall.

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Presentation transcript:

1 Host Hardening Chapter 6 Copyright 2003 Prentice-Hall

2 Figure 6-1: Hardening Host Computers The Problem  Computers installed out of the box have known vulnerabilities Not just Windows computers  Hackers can take them over easily  They must be hardened—a complex process that involves many actions

3 Figure 6-1: Hardening Host Computers Elements of Hardening  Physical security (Chapter 2).  Secure installation and configuration  Fix known vulnerabilities  Turn off unnecessary services (applications)  Harden all remaining applications (Chapter 9)

4 Figure 6-1: Hardening Host Computers Elements of Hardening  Manage users and groups  Manage access permissions For individual files and directories, assign access permissions specific users and groups  Back up the server regularly  Advanced protections

5 Figure 6-1: Hardening Host Computers Security Baselines Guide the Hardening Effort  Specifications for how hardening should be done  Different for different operating systems  Different for different types of servers (webservers, mail servers, etc.)  Needed because it is easy to forget a step

6 Figure 6-1: Hardening Host Computers Server Administrators Are Called Systems Administrators

7 Figure 6-1: Hardening Host Computers Windows Computers  Microsoft Network Operating Systems (NOSs) LAN Manager (LANMAN) Windows NT Server Windows 2000 Server Windows 2003 Server (called.NET in the book)  Graphical user interface looks like client versions to ease learning (Figure 6-2)

8 Figure 6-2: Windows 2000 Server User Interface

9 Figure 6-1: Hardening Host Computers Windows Computers  Administrative Tools Group under Programs has Microsoft Management Consoles (MMCs) (Figure 6-3) Used to conduct most administrative actions Can add snap-ins for specific functionality

10 Figure 6-3: Computer Management Microsoft Management Console (MMC) System Tools snap-in

11 Figure 6-1: Hardening Host Computers Windows Computers  Windows 2000 introduced hierarchical domain structure with Active Directory Domain is a collection of resources Domain contains one or more domain controllers, member servers, client PCs Group policy objects (GPOs) on a domain controller can implement policies throughout a domain

12 Figure 6-1: Hardening Host Computers UNIX  Many versions of UNIX  LINUX is a set of versions for PCs—there are several different distributions  User can select the user interface—GUI or command-line interface (CLI)  CLIs are called shells (Bourne, BASH, etc.)  CLIs have picky syntax, capitalization, and spacing

13 Figure 6-1: Hardening Host Computers Internetwork Operating System (IOS)  For Cisco Routers, Some Switches, Firewalls Other Host Operating Systems  Macintosh  Novell NetWare  Firewalls  Even cable modems with web-based management interfaces

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