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Chapter 18.
Administering a Domain via DNS
In order for computers to find one another byname on a TCP/IP network, the computers need some method of name resolution that is, converting a hostname like gingko.threeroomco.com into an IP address like 192.168.78.109, or vice-versa. There are
several ways of doing this, but one of the most common is to use a Domain Name System (DNS) server, also known as a name server. In fact, the instructions on basic
configuration presented in
Network Configuration, describe configuring a computer to use a DNS server for
name resolution. These instructions presuppose, however, that a DNS server
exists that you can use. Furthermore, the Internet as a whole relies upon a
distributed set of DNS servers. Two major reasons for running a name server
yourself are closely related to these two uses of DNS. You might want to run a
DNS server on your own network to translate names into IP addresses for your
own computers, or you might want to run an externally visible DNS server to
allow others to address your local machines by name.In any event, DNS administration involves
setting up a number of configuration files that control the DNS server,
including specifications of the domains that it handles. Depending upon your
needs, you may have to dig into DNS features that don''t directly involve your
own configuration, such as obtaining a domain name. You might also want the DNS
server to coordinate its activities with other servers on your network,
particularly your DHCP server, as described in
,
Configuring Other Computers via DHCP.Linux''s DNS servers fall in the middle range
of server complexity; they aren''t as difficult to administer as a very complex
system like Kerberos, but they''re harder to administer than a simple server
like Telnet. This chapter can get you started, and may be all you need to administer
a simple domain. For more complex configurations, you can read your DNS
server''s documentation, or a book on the subject such as Albitz and Liu''s DNS and BIND, 4th Edition (O''Reilly, 2001) or Hunt''s Linux DNS Server Administration (Sybex, 2000).
