dns server configuration
DESCRIPTION
Steps for DNS Server configuration....TRANSCRIPT
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DNS Server Configuration
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INTRODUCTION TO DNS SERVER
DNS provides the resolution of host names to IP &
vice versa. . e.g www.wbut.ac.in to 192.168.43.10 (IPv4)
Defines a hierarchical name space where each level of the namespace is separated by a “ . ”
e.g 192.168.64.27(class B).
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Types of DNS Server
Master DNS server:-Stores authorative records for your domain
Slave DNS server:-Relies on master DNS server for data.
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Caching-only DNS server:-Stores recent requests like a proxy server.
Forwarding –only DNS server:-Refers to all requests to other DNS servers.
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DNS Master server configuration
STEP-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*
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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 192.168.0.254
[root@server~] ifconfig etho
inet addr: 192.168.0.254
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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 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
DNS Master server configuration
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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/namedCopy 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
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DNS Master server configuration
STEP-5:Open forward zone
file [root@server
named]# vi example.com.zone
and modify as
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DNS Master server configuration
STEP-5 contd:
Open reverse lookup zone file
[root@server named]# vi 0.168.192.in-addr.arpa.zone
and modify as
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DNS Master server configuration
STEP-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
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DNS Master server configuration STEP-7:Now start the named service
If service restart without any error then the master name server is successfully configured
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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.
Summary
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