Book Image

DNS in Action

By : CP Books a.s.
Book Image

DNS in Action

By: CP Books a.s.

Overview of this book

The Domain Name System is one of the foundations of the internet. It is the system that allows the translation of human-readable domain names into machines-readable IP addresses and the reverse translation of IP addresses into domain names. This book describes the basic DNS protocol and its extensions; DNS delegation and registration, including for reverse domains; using DNS servers in networks that are not connected to the internet; and using DNS servers on firewall machines. Many detailed examples are used throughout the book to show perform various configuration and administration tasks.
Table of Contents (16 chapters)
DNS in Action
About the Authors
Country Codes and RIRs

10.4 End Remarks

In this book, we learned about DNS principles, resolver configuration, and configuration of various name servers. You must have realized that domain registration and delegation is altogether quite easy. However, in spite of its comprehensibility, the DNS is often a source of problems to ordinary computer users.

The correct diagnosis of computer problems is similar to a correct medical diagnosis. In both cases, it is important not only to reach the correct diagnosis, but also to do so in the minimum time. We can suspect mistakes in a DNS configuration if a user complains either that his or her computer does not communicate at all or, more often, the communication seems to be slow from time to time even if the network infrastructure is fast.

In such cases, if a user asks you for help, you should sit down in front of the user’s computer, run the command prompt (never mind if it is a UNIX or a Windows machine), and find out the following:

  1. 1. Find the IP addresses of an default...