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.

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DNS in Action
CP Books a.s.
Apr, 2006 | 0 hours 0 minutes
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Table of Contents (16 chapters)
DNS in Action
DNS in Action
Credits
Credits
About the Authors
About the Authors
Preface
Preface
Free Chapter
1
Domain Name System
Domain Name System
1.1 Domains and Subdomains
1.2 Name Syntax
1.3 Reverse Domains
1.4 Domain 0.0.127.in-addr.arpa
1.5 Zone
1.6 Reserved Domains and Pseudodomains
1.7 Queries (Translations)
1.8 Resolvers
1.9 Name Server
1.10 Forwarder Servers
2
DNS Protocol
DNS Protocol
2.1 Resource Records
2.2 DNS Protocol
2.3 DNS Query
3
DNS Extension
DNS Extension
3.1 DNS Update
3.2 DNS Notify
3.3 Incremental Zone Transfer
3.4 Negative Caching (DNS NCACHE)
3.5 DNS IP version 6 Extension
3.6 DNS Security Protocols
3.7 TSIG
3.8 Saving Certificates to DNS
4
Name Server Implementation
Name Server Implementation
4.1 DNS Database
4.2 RR Format
4.3 Name Server Implementation in BIND
4.4 Microsoft’s Native Implementation of DNS in Windows 2000/2003
5
Tools for DNS Debugging and Administration
Tools for DNS Debugging and Administration
5.1 Tools for DNS Debugging
5.2 The rndc Program
5.3 Errors in DNS Configuration
6
Domain Delegation and Registration
Domain Delegation and Registration
6.1 Example 1
6.2 Example 2
6.3 Domain Registration
7
Reverse Domain Delegation
Reverse Domain Delegation
Server ns.company.com
Server ns.provider.net
Server ns.ripe.net (authoritative server for a superior domain)
Server ns.company.com
Server ns.branch.company.com
8
Internet Registry
Internet Registry
8.1 International Organizations
8.2 Regional Internet Registry (RIR)
8.3 IP Addresses and AS Numbers
8.4 Internet Registry
8.5 Delegation of Second-Level Domains
9
DNS in Closed Intranets
DNS in Closed Intranets
9.1 Configuring a Root Name Server on the Same Server (BIND Version 4)
9.2 Configuring a Root Name Server on a Separate Server (BIND Version 4)
9.3 Root DNS Server in Windows 2000/2003
10
DNS and Firewall
DNS and Firewall
10.1 Shared DNS for Internet and Intranet
10.2 Name Server Installed on Firewall
10.3 Dual DNS
10.4 End Remarks
Country Codes and RIRs
Country Codes and RIRs
Index
Index

6.1 Example 1

The hostmaster of the company decides to administer the primary name server on one of the company’s computers. The server is called ns.company.tld and has the IP address 194.149.10.11. The ns.company.tld server runs on UNIX and BIND version 4.9. (Windows 2000/2003 has a similar configuration.) The administrator wants to administer the secondary name server on an ISP name server called ns.provider.net.

The following diagram shows the hierarchy of name servers, and the sections below describe the individual configuration files or their sections that specify the required delegation:

Figure 6.1: Domain delegation

6.1.1 Server ns.company.tld

This server acts as a primary server for the company.tld zone.

File named.boot 

...
primary company.tld company.tld.zone
...

File company.tld.zone 

@ IN SOA ns.company.tld hostmaster.company.tld (
1998082402 ; Serial
28800 ; Refresh 8 hours
7200 ; Retry 2 hour
604800 ; Expire 7 days
86400 ) ; Minimum TTL 1 day
; ns records specifying the authoritative...
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