Configure DNS server in RHEL7 / CentOs

DNS stands for Domain name system used for resolving hostname to ip address or ip address to hostname

server (IP -->  192.168.10.59)

-->install the 'bind' software

# yum install bind

 --> to find out the configuration file of bind

# rpm -qc bind

 --> prepare a backup of configuration file

# cp  /etc/named.conf  /etc/named.conf.bak

--> empty the configuration file

# >/etc/named.conf

# vim /etc/named.conf

options {

directory  "/var/named" ;

};

zone "test.com"  IN  {

type master ;

file  "myfile" ;

};


# cd /var/named

# cp named.localhost  myfile

# vim myfile

$TTL 1D
@       IN SOA  @ rname.invalid. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      @
        A       127.0.0.1
        AAAA    ::1

www.test.com.         IN          A       192.168.10.2

try   CNAME  www

hello.test.com.         IN          A        10.10.10.10


# chown named:named myfile

# systemctl restart named

# systemctl enable named


Client (IP --> 192.168.10.60)

# vim /etc/resolv.conf

search    test.com

nameserver    192.168.10.59

# nslookup   www.test.com

# nslookup try.test.com

# host try

# host www

# nslookup  hello.test.com