DNS and BIND - Softcover

Albitz, Paul; Liu, Cricket

Softcover

ISBN 10: 1565925122 ISBN 13: 9781565925120

Publisher: O'Reilly Media, 1998

Synopsis

DNS and BIND discusses one of the Internet's fundamental building blocks: the distributed host information database that's responsible for translating names into addresses, routing mail to its proper destination, and many other services. As the authors write in the preface, if you're using the Internet, you're already using DNS -- even if you don't know it.The third edition covers BIND 4.9, on which most commercial products are currently based, and BIND 8, which implements many important new features and will be the basis for the next generation of commercial name servers. It also covers topics like DNS security (greatly improved with BIND 8.1), asynchronous notification of changes to a zone, dynamic updates, and programming with Perl's Net::DNS module.Whether you're an administrator involved with DNS on daily basis, or a user who wants to be more informed about the Internet and how it works, you'll find that this book is essential reading.Topics include:

• What DNS does, how it works, and when you need to use it
• How to find your own place in the Internet's name space
• Setting up name servers
• Using MX records to route mail
• Configuring hosts to use DNS name servers
• Subdividing domains (parenting)
• Securing your name server: restricting who can query your server, preventing unauthorized zone transfers, avoiding bogus name servers, etc.
• Mapping one name to several servers for load sharing
• Troubleshooting: using nslookup, reading debugging output, common problems
• DNS programming, using the resolver library and Perl's Net::DNS module

About this title

Review

This is the definitive book on the Domain Name System (DNS), the powerful scheme that facilitates the translation of English-like domain names (www.amazon.com) into computer-comprehensible Internet Protocol (IP) addresses (208.216.182.15). If you run a DNS server of any kind, particularly under Unix, you need to have this book on hand.

This book's early chapters give a view of DNS from high altitude, explaining basic concepts such as domains, name servers, and name resolution. From there, the authors proceed on a more practical tack, presenting specific instructions for setting up your own domain and DNS server using BIND. The authors then tell you what to do as your domain grows and you need to add more machines, subdomains, and greater throughput capacity. They also talk a lot about nslookup and C programming with the various DNS and BIND libraries. Administrators will find the chapter on BIND debugging output particularly helpful. Here, the authors translate BIND's mysterious error messages and offer specific strategies for fixing and optimizing the program. This edition covers BIND 8.1.2, but pays lots of attention to older versions that are still in wide use (4.8.3 and 4.9). The authors are careful to note differences among the versions. --David Wall

From the Publisher

This book is a complete guide to the Internet's Domain Name System (DNS) and the Berkeley Internet Name Domain (BIND) software, the UNIX implementation of DNS. In this second edition, the authors continue to describe BIND version 4.8.3, which is included in most vendor implementations today. In addition, you'll find complete coverage of BIND 4.9.4, which in all probability will be adopted as the new standard in the near future. DNS is the system that translates hostnames (like "rock.ora.com") into Internet addresses (like 192.54.67.23). Until BIND was developed, name translation was based on a "host table"; if you were on the Internet, you got a table that listed all the systems connected to the Net and their addresses. As the Internet grew from hundreds to hundreds of thousands of systems, host tables became unworkable. DNS is a distributed database that solves the same problem effectively, allowing the Net to grow without constraints. Rather than having a central table that gets distributed to every system on the Net, it allows local administrators to assign their own hostnames and addresses and install these names in a local database. This database is automatically distributed to other systems as names are needed. In addition to covering the basic motivation behind DNS and how to set up the BIND software, this book covers many more advanced topics, including using DNS and BIND on Windows NT systems; how to become a "parent" (i.e., "delegate" the ability to assign names to someone else); how to use DNS to set up mail forwarding correctly; debugging and troubleshooting; and programming. Assumes a basic knowledge of system administration and network management.

About this edition

• Publisher: O'Reilly Media
• Publication date: 1998
• ISBN 10: 1565925122
• ISBN 13: 9781565925120
• Binding: Paperback
• Edition number: 3
• Number of pages: 499