Red Hat Enterprise Linux 5 Administration Unleashed

346CHAPTER 16Hostname Resolution with BINDThe is optional. It can be one of the following:. IN: Internet zone. The default class if one is not given.. HS: Hesiod zone. Hesiod is a service used to distribute system information such asuser and group definition and password files and print configuration files.. CHAOS: CHAOSnet zone. CHAOSnet is a LAN protocol.The must be one of the following:. master: Authoritative name server for the zone.. slave: Secondary name server for the zone. Retrieve zone data from the master server.. hint: Provide a list of root name servers, which are used to find a root name serverand retrieve a list of the most recent root name servers.. stub: Like a slave zone except it only retrieves the NS records from the master zone.Not a standard DNS zone: specific to BIND.. forward: Set forwarding for the domain given as the zone name.. delegation-only: Use to enforce delegation-only status of infrastructure zones suchas COM and NET. Does not affect answers from forwarders.A full list of options for is available in the “BIND 9 Administrator ReferenceManual” included with the bind package in the /usr/share/doc/bind-/arm/Bv9ARM.pdf file.Configuring rndc.confThe name server control utility, rndc, sends named digitally signed commands over a TCPconnection. Its configuration file /etc/rndc.conf stores configuration information suchas the name server to connect to and which key to use for the digital signature. Theutility is started when named is started using the initialization script.The rndc.conf file uses syntax similar to named.conf. The same comment styles are available,statements are within braces, and the semicolon is used as the terminating character.Only three types of statements can be declared:NOTEThe preferences in rndc.conf can be overridden by specifying values on the commandline when rndc is started. Refer to Table 16.1 for a list of command-line options.. options: The options statement can have three clauses. The default-server clausedefines the IP address of the name server to which the rndc should connect to andsends commands. The default-key clause lists the key-id of the key to use if a keystatement is not listed in the server statement for the name server. If default-keyis used, a key statement with the same key-id must be declared in the samerndc.conf file.