DNS server configuration


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Steps for DNS Server configuration....

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  • STEP-3:Create the main configuration file for DNS, that is named.conf.By default a sample file/var/named/chroot/etc/named. caching- nameserver .conf ,is createdEdit this one by named.conf file or create new one as [root@server etc]# vi/ var/named/chroot/etc/named.confSet directory location for Forward zone and Reverse
  • DNS server configuration

    1. 1. INTRODUCTION TO DNS SERVER DNS provides the resolution of host names to IP & vice versa. . e.g www.wbut.ac.in to (IPv4) Defines a hierarchical name space where each level of the namespace is separated by a “ . ” e.g B).
    2. 2. Types of DNS ServerMaster DNS server:-Stores authorative records for your domainSlave DNS server:-Relies on master DNS server for data.
    3. 3. Caching-only DNS server:-Stores recent requests like a proxy server.Forwarding –only DNS server:-Refers to all requests to other DNS servers.
    4. 4. DNS Master server configurationSTEP-1: bind & caching name server . rpm is required to configure DNS. Check them for install ,if not installed, install them as  [root@server~]# rpm –qa cach*  [root@server~]# rpm –qa bind*
    5. 5. DNS Master server configurationSTEP-2: Set hostname to server.example.com . [root@server~]# cat/etc/ sysconfig /network HOSTNAME= server.example.com Set IP address to [root@server~] ifconfig etho inet addr:
    6. 6. DNS Master server configuration STEP-3: Create the main configuration file for DNS, that is named.conf.• By default a sample file /var/named/chroot/etc/named. caching- nameserver .conf ,is created Edit this one by named.conf file or create new one as [root@server etc]# vi/ var/named/chroot/etc/named.conf Set directory location for Forward zone and Reverse lookup zone
    7. 7. DNS Master server configuration STEP-4: Configure example.com.zone for forward zone and 0.168.192.in- address.arpa for reverse zone. They will be stored in “/var/named/chroot/var/named/” location. Change directory to [root@server named]# cd/ var/named/chroot/var/named Copy sample file to name we have set in named.conf. [root@server named]# cp localhost.zone example.com.zone [root@server named]# cp named.local 0.168.192.in- addr.arpa.zone
    8. 8. DNS Master server configuration  STEP-5:  Open forward zone file  [root@server named]# vi example.com.zone and modify as
    9. 9. DNS Master server configurationSTEP-5 contd:Open reverse lookup zone file [root@server named]# vi 0.168.192.in-addr.arpa.zone and modify as
    10. 10. DNS Master server configurationSTEP-6:Change the ownership of these zone file to named group. [root@server named]# chgrp named example.com.zone [root@server named]# chgrp named 0.168.192.in- addr.arpa.zone
    11. 11. DNS Master server configurationSTEP-7: Now start the named service If service restart without any error then the master name server is successfully configured
    12. 12. Summary DNS is an integral part in most protocols used in the internet. Makes the internet human friendly for all of us.. Is the world’s largest distributed database system. Fits the international model perfectly. In simple terms DNS is a mapping between names and IP addresses.