Building Dmzs for Enterprise Networks by Thomas Shinder

By Thomas Shinder

This e-book covers what an administrator must plan out and combine a DMZ right into a community for small, medium, and company networks. the first function of a DMZ is to mitigate dangers linked to providing providers to untrusted consumers. A DMZ accomplishes this through supplying network-level security for a internet hosting setting, in addition to segregating public internet hosting amenities from the personal community infrastructure. This small yet extremely important phase of the community is uncovered to the general public web and is the main tough quarter at the community to create and preserve, either from an engineering and a safety point of view. during this booklet readers will tips on how to make DMZs utilizing best-of-breed software program and items from Microsoft, sunlight, Cisco, Nokia, and cost aspect.

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Extra resources for Building Dmzs for Enterprise Networks

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You will learn that the DMZ is publicly accessible, so failing to harden these systems almost guarantees your network will be hacked and exploited. In this chapter we look at Sun Solaris bastion hosts, configuring the fundamentals, controlling access to resources, auditing access to resources, authentication, and all the hardening you need to lock down your systems. The chapter covers the hardening details as well as showing you how to configure security, set up remote administration of DMZ hosts, vulnerability-scan your hosts, and implement advanced host security.

Bastion host A machine (usually a server) located in the DMZ with strong (untrusted host) host-level protection and minimal services. It is used as a gateway between the inside and the outside of networks. The bastion host is normally not the firewall but a separate machine that will probably be sacrificial in the design and expected to be compromised. The notation “untrusted host” may be used because the bastion host is always considered to be potentially compromised and therefore should not be fully trusted by internal network clients.

This appendix shows you how, step by step. The DMZ is a critical segment found in many networks (any network that has a WAN link or Internet connection could build a DMZ). We think that you’ll find this book your one-stop guide to planning, designing, deploying, and maintaining a secure and viable DMZ segment on your production network. —Robert J. qxd 2 6/3/03 5:08 PM Page 2 Chapter 1 • DMZ Concepts, Layout, and Conceptual Design Introduction During the course of the last few years, it has become increasingly evident that there is a pronounced need for protection of internal networks from the outside world.

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