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

Server (authoritative server for a superior domain)


10 IN NS

The delegation of a domain to functional name servers must be performed by regional Internet registries (RIPE, APNIC, ARIN, AfriNIC, or LACNIC). The hostmaster must request this delegation from the RIPE, APNIC, ARIN, or LACNIC hostmaster using a form. An example is listed in Section 7.1.

The company, Company Ltd., has a branch. This branch uses 128 IP addresses, i.e., the subnetwork The branch is administering its own name server with the name and an IP address of Therefore it is convenient that the reverse domain for the subnetwork 194.149.10/25 will be delegated to the name server

This example is quite common in practice, and we will use it for a demonstration of delegating a reverse domain for a subnetwork. But first a little theory.

The delegation of reverse domains...