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Module 10: DNS The Domain Name Services

Module 10: DNS The Domain Name Services. DNS Servers. 1. Primary name server It knows about all hosts and subdomains existing under its domain. 2. Secondary name server It woks as a backup server for the primary name server. 3. Caching name server

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Module 10: DNS The Domain Name Services

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  1. Module 10: DNSThe Domain Name Services Module 10: The Domain Name Services

  2. DNS Servers • 1. Primary name server It knows about all hosts and subdomains existing under its domain. • 2. Secondary name server It woks as a backup server for the primary name server. • 3. Caching name server It contains no configuration files for any particular domain. It will keep a local copy of result from a query. Module 10: The Domain Name Services

  3. Installing DNS server • GUI: Desktop -> System Setting -> Add or Remove Packages -> DNS Name Server • Command line: RPMS Module 10: The Domain Name Services

  4. Starting DNS • GUI: Desktop -> System Setting -> Server Setting -> Services -> named • Command line: named start /etc/rcX.d K45named -> S55named Module 10: The Domain Name Services

  5. Configuring DNS server • GUI: Desktop -> System Setting -> Server Setting -> Domain Name System • Command line: /etc/named.conf Module 10: The Domain Name Services

  6. DNS Records Types • SOA: Start of Authority • NS: Name Server • A: Address Record • PTR: Pointer Record • MX: Mail Exchanger • CNAME: Canonical Name • RP and TXT: The documentation Entries Module 10: The Domain Name Services

  7. Configuring Clients • GUI: Desktop-> System Setting -> Network • Command line: /etc/resolv.conf nameserver IP_ address nameserver 192.168.1.1 /etc/nsswitch.conf hosts: files nisplus nis dns Module 10: The Domain Name Services

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