DNS Server configuration in CentOS step by step

-

DNS (Domain Name System) translates hostnames or URLs into IP addresses. For example if we type  kirtikumarpatel.blogspot.in  in browser, the DNS server translates the domain name into its associated ip address. Since the IP addresses are hard to remember, DNS servers are used to translate the hostnames like ansh.kirtipatel.com to 192.xxx.xx.xxx. So it makes easy to remember the domain names instead of its IP address.

Scenario

Primary(Master) DNS Server Details:
Operating System     : CentOS 6.5 server
Hostname             : ansh.kirtipatel.com
IP Address           : 192.168.1.100/24
Setup Primary(Master) DNS Server
[root@ansh ~]# yum install bind* -y


1. Configure DNS Server
First go to /etc/hosts file

[root@ansh ~]# vi /etc/hosts

and add hostname with ip address

192.168.1.100   ansh.kirtipatel.com ansh

Add the lines as shown below in ‘/etc/named.conf’ file

[root@masterdns ~]# vi /etc/named.conf 
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
options {
listen-on port 53 { 127.0.0.1; 192.168.1.100; }; ### Master DNS IP ###
#listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query     { any; };
allow-transfer{ localhost; };
recursion yes;
dnssec-enable yes;
dnssec-validation yes;
dnssec-lookaside auto;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
managed-keys-directory "/var/named/dynamic";
};
logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};
zone "." IN {
type hint;
file "named.ca";
};
zone"kirtipatel.com" IN {
type master;
file "forward.com.zone";
allow-update { none; };
};
zone"1.168.192.in-addr.arpa" IN {
type master;
file "reverse.com.zone";
allow-update { none; };
};
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";

U can also add Zone entry in /etc/named.rfc1912.zones 
if u not put this line here..

2. Create Zone files
Create forward and reverse zone files which we mentioned in the ‘/etc/named.conf’ file.

2.1 Create Forward Zone
Create forward.com.zonefile in the ‘/var/named’ directory.
[root@ansh ~]# vi /var/named/forward.com.zone
$TTL 86400
@   IN  SOA     ansh.kirtipatel.com. root.ansh.kirtipatel.com. (
        2011071001  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
@       IN  NS          ansh.kirtipatel.com.


ansh       IN  A   192.168.1.100 
2.2 Create Reverse Zone
Create reverse.com.zone file in the ‘/var/named’ directory.
[root@ansh ~]# vi /var/named/reverse.com.zone 
$TTL 86400
@   IN  SOA     ansh.kirtipatel.com. root.ansh.kirtipatel.com. (
        2011071001  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
@       IN  NS          ansh.kirtipatel.com.


100      IN  PTR   ansh.kirtipatel.com.

2.2 change ownership
[root@ansh ~]# cd /var/named
[root@ansh ~]#chown root:named forward.com.zone
[root@ansh ~]#chown root:named reverse.com.zone
3. Start the DNS service
[root@ansh ~]# service named start
Starting named:                                            [  OK  ]
[root@ansh ~]# chkconfig named on

After That u will try to check with nslookup and dig commang.

Comments

Post a Comment

Popular posts from this blog

Step By Step Configuration Cisco VoIP Phone in Cisco Packet Tracer.

-
Image
Router 1 Configuration Router#sh running-config Building configuration... Current configuration : 2102 bytes ! version 12.4 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router ! ! ! ! ! ip dhcp pool voice  network 192.168.10.0 255.255.255.0  default-router 192.168.10.1  option 150 ip 192.168.10.1 ip dhcp pool data  network 172.16.0.0 255.255.0.0  default-router 172.16.0.1  option 150 ip 172.16.0.1 ! ! ! ! ! ! ! ! ! spanning-tree mode pvst ! ! ! ! interface FastEthernet0/0  no ip address  duplex auto  speed auto ! interface FastEthernet0/0.10  encapsulation dot1Q 10  ip address 192.168.10.1 255.255.255.0 ! interface FastEthernet0/0.20  encapsulation dot1Q 20  ip address 172.16.0.1 255.255.0.0 ! interface FastEthernet0/1  no ip ...
Read more

How To Setup Social Publishing CMS (Content Managemnet System) Using Pligg in CentOS 6.5

-
Image
Pligg   is an open-source CMS social publishing software that encourages visitors to register on your website so that they can submit content and connect with other users. It is used to setup your own social publishing community in just minutes.   In this article, I use CentOS 6.5 to setup this website. My hostname and IP Address are ansh.geniusansh.com   and   192.168.1.150/24   respectively. Change these values as per your setup. Prerequisites Install the following prerequisites to install and configure Pligg: [root@ansh ~]# yum install mysql mysql-server httpd php php-mysql php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring wget unzip -y   Start/Restart MySQL and Apache services now: [root@ansh ~]# /etc/init.d/mysqld start [root@ansh ~]# /etc/init.d/httpd start [root@ansh ~]# chkconfig mysqld on [root@ansh ~]# chkconfig httpd on U can see LAMP configuration on my previous blog for  MySql Configuration. Cr...
Read more

How To Install And Configuring OpenFire XMPP Chat server on centos 6.5

-
Image
INTRODUCTION: Extensible Messaging and Presence Protocol (XMPP) is a communications protocol for message-oriented middleware based on XML (Extensible Markup Language). The protocol was originally named Jabber and was developed by the Jabber open-source community in 1999 for near real-time, instant messaging (IM), presence information, and contact list maintenance. Designed to be extensible, the protocol has also been used for publish-subscribe systems, signalling for VoIP, video, file transfer, gaming, Internet of Things applications such as the smart grid, and social networking services. Unlike most instant messaging protocols, XMPP is defined in an open standard and uses an open systems approach of development and application, by which anyone may implement an XMPP service and interoperate with other organizations’ implementations. Because XMPP is an open protocol, implementations can be developed using any software license; although many server, clie...
Read more