DNS Configuration in RHEL 5

DNS Configuration in RHEL 5

Step 1:

set static ipaddress by using these commands

system-config-network

or

ifconfig eth0 192.168.0.254

Step 2:

Install all these following rpms

rpm -ivh bind-9.3.3-7.el5.i386.rpm

rpm -ivh bind-chroot-9.3.4-9.P1.el5.i386.rpm

rpm -ivh bind-devel-9.3.3-7.el5.i386.rpm

rpm -ivh bind-libbind-devel-9.3.3-7.el5.i386.rpm

rpm -ivh bind-libs-9.3.3-7.el5.i386.rpm

rpm -ivh bind-sdb-9.3.3-7.el5.i386.rpm

rpm -ivh caching-nameserver-9.3.3-7.el5.i386.rpm

Step 3:

cd /var/named/chroot/var/named/

cp localdomain.zone for.prasanna.com

cp named.local rev.prasanna.com

chown root:named for.prasanna.com

chown root:named rev.prasanna.com

Step 4:

Edit the following files and add the respective lines in those

vi /etc/sysconfig/network

hostname=server.prasanna.com

vi /etc/sysconfig/network-scripts/ifcfg-eth0

peerdns=no

vi /etc/resolv.conf

search prasanna.com

nameserver 192.168.0.254

vi /etc/hosts

192.168.0.254

cd /var/named/chroot/etc

cp named.caching-nameserver.conf named.conf

chown root:named named.conf

vi named.conf

option{

listen-on pot 53{127.0.0.1; 192.168.0.254;};

allow-query{ localhost; 192.168.0.0/24;}

match-clients {localhost; 192.168.0.0/24;};

match-destination {localhost; 192.168.0.0/24;};

vi /etc/named.rfc1912.zones

zone "prasanna.com" IN {

type master;

file "for.prasanna.com";

allow-update {none;};

};

zone "0.168.192.in-addr.arpa" IN {

type master;

file "rev.prasanna.com";

allow-update { none; };

};

Step 5:

Edit for.prasanna.com and rev.prasanna.com in the respective location /var/named/chroot/var/named

in the following way.

for.prasanna.com

$TTL 86400

@ IN SOA server.prasanna.com. root.server.prasanna.com. (

42 ; serial (d. adams)

3H ; refresh

15M ; retry

1W ; expiry

1D ) ; minimum

IN NS server.prasanna.com.

server IN A 192.168.0.254

client8 IN A 192.168.0.108

client1 IN A 192.168.0.101

client2 IN A 192.168.0.102

client3 IN A 192.168.0.103

client4 IN A 192.168.0.104

client5 IN A 192.168.0.105

client6 IN A 192.168.0.106

client7 IN A 192.168.0.107

rev.prasanna.com

$TTL 86400

@ IN SOA server.prasanna.com. root.server.prasanna.com. (

42 ; serial (d. adams)

3H ; refresh

15M ; retry

1W ; expiry

1D ) ; minimum

IN NS server.prasanna.com.

254 IN PTR server.prasanna.com.

101 IN PTR client1.prasanna.com.

102 IN PTR client2.prasanna.com.

103 IN PTR client3.prasanna.com.

104 IN PTR client4.prasanna.com.

105 IN PTR client5.prasanna.com.

106 IN PTR client6.prasanna.com.

107 IN PTR client7.prasanna.com.

108 IN PTR client8.prasanna.com.

Step 6:

service named restart

chkconfig named on

dig -x 192.168.0.254

if you get all the four sections question, answer,additional, authority as 1, you got it. Otherwise, some check the steps properly.

Step 7:

Client side: in station1.prasanna.com

just touch these files with the existing details

vi /etc/resolv.conf

search prasanna.com

nameserver 192.168.0.254

vi /etc/hosts

192.168.0.254 server.prasanna.com

192.168.0.1 station1.prasanna.com

dig -x 192.168.0.254

you should get the same sections like the server, Otherwise check the steps properly.