Linux Addministration

Linux Addministration

• 1.
  SETTINGS UP A PRIMARYNAME SERVER
• 2.
  ■ To setup a primary name server, you’ll need to define a zone. ■ This consists of two parts. ■ First you’ll need to tell the DNS server which zones it has to service, and next you’ll need to create a confi guration file for the zone in question ■ the DNS server which zones it has to service, you need to include a few lines in /etc/named.conf. In these lines,
• 3.
  ■ As youcan see, some sections exist by default in the named.rfc1912.zone fi le.These sections ensure that localhost name resolving is handled correctly by the DNS server.To tell ■ the DNS server that it also has to service another zone, add the following few lines: ■ zone "example.com" IN { ■ type master; ■ file "example.com"; ■ };
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  ■ The first line, zone "example.com" IN, tells named that it is responsible for a zone with ■ the name example.com that is of the type IN.This means this zone is servicing IP addresses. ■ (In theory, DNS also supports other protocols.) After the zone declaration, you can fi nd a great
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  ■ further definition of the zone between braces. In this case, the defi nition consists of just ■ two lines.The fi rst line tells named that this is the master server.The second line tells named ■ that the confi guration fi le is example.com.This fi le can, of course, be found in the directory ■ /var/named, which was set in /etc/named.conf as the default directory.
• 6.
  Setting Up aPrimary Name Server ■ 1. Make sure that the bind package is installed on your host computer. ■ 2. Open the /etc/named.conf file, and make sure the following parameters are Include. ■ directory is set to /var/named ■ listen-on port 53 is set to any ■ allow-query is set to any ■ forwarders contains the IP address of your Internet provider’s DNS name server ■ dns-sec validation is set to no ■ 3. Open the /etc/named.rfc1912.zones file, and create a definition for the example.com domain.
• 7.
  ■ 3. Openthe /etc/named.rfc1912.zones file, and create a defi nition for the example.com domain. ■ 4. Create a file /var/named/example.com, and give it contents similar to those in Listing ■ 14.4. Change it to match the hostnames in your environment. ■ 5. Make sure that the DNS resolver in /etc/resolv.conf is set to your own DNS server. ■ 6. Use dig yourhost.example.com, and verify that your DNS server gives the correct information from your DNS database.
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  THANKUYOU......