Setting up a slave DNS server
Redundancy is important to ensure key services remain available in the event of an issue. As DNS is one of the most critical components of a network, whether it's a private intranet or the public Internet, having only one authoritative DNS server is unwise. In fact, IANA's Technical Requirements for Authoritative Name Servers document states that there must be a minimum of two different authoritative name servers for the zone. This recipe shows you how to configure a second BIND installation to act as a secondary authoritative server that receives its zone information from the primary in a master/slave configuration. A lookup request can then be satisfied by either server and be considered an authoritative response. ...
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