Procedure

1. Install BIND.

   # yum install bind bind-utils

2. Enable and start the named service.

   # systemctl enable --now named

Procedure

1. Ensure to take backup of the original configuration file.

   # cp /etc/named.conf /etc/named.conf.orig

2. Edit the named.conf file with the following changes:

   • In the options section, uncomment the listen-on, listen-on-v6, and directory parameters:

     acl clients {192.0.2.0/24;};
     
     options {
             listen-on port 53 { any; };
     
             listen-on-v6 port 53 { any; };
     
             directory       /var/named;

   • Set the allow-query parameter to your network address. Only the hosts on your local network can query the DNS server.

         allow-query     { localhost; clients; };
         allow-recursion { localhost; clients; };
         recursion yes;
         allow-update { none; };
         allow-transfer { localhost; };
     };
     logging {
             channel default_debug {
                     file data/named.run;
                     severity dynamic;
             };
     };

   • Use the package shipped file as:

     include /etc/named.rfc1912.zones;

   • Create an extra include for any custom zone configuration.

     include /etc/named/example.zones;

3. Create the /etc/named/example.zones file and add the following zone configuration.

   //forward zone
   zone example.com IN {
           type master;
           file example.com.zone;
   
   };
   
   //backward zone
   zone "2.0.192.in-addr.arpa" IN {
           type master;
           file example.com.rzone;
   
   };

   • type: It defines the zone’s role of the server.
   • master: It is an authoritative server and maintains the master copy of the zone data.
   • file: It specifies the zone’s database file.

4. Go to DNS data directory /var/named/.

   # cd /var/named/
   # ls
   
   data    dynamic  named.ca  named.empty    named.localhost    named.loopback  slaves

5. Create the DNS record file and add the DNS record data.

   # cp -p named.localhost example.com.zone

6. Edit the example.com.zone with your forward zone parameters.

   $TTL    86400
   @               IN SOA  example.com. root (
   42              ; serial
   3H              ; refresh
   15M             ; retry
   1W              ; expiry
   1D )            ; minimum
                   IN NS           ns
   ;use IP address of named machine for ns
   ns       IN A          192.0.2.1
   station0        IN A            192.168.x.xxx
   station1        IN A            192.168.x.xxx
   station2        IN A            192.168.x.xxx
   station3        IN A            192.168.x.xxx

7. Create the example.com.rzone file.

   # cp -p named.localhost example.com.rzone

8. Edit the example.com.rzone file with your reverse zone parameters.

   $TTL    86400
       @       IN      SOA     example.com. root.example.com.  (
       1997022700 ; serial
       28800      ; refresh
       14400      ; retry
       3600000    ; expire
       86400 )    ; minimum
               IN      NS      ns.example.com.
       101     IN      PTR     station1.example.com.
       102     IN      PTR     station2.example.com.
       103     IN      PTR     station3.example.com.
       104     IN      PTR     station4.example.com.

   Verification steps

   • Verify the zone file

     # named-checkzone example.com example.com.zone
     
     zone example.com/IN: loaded serial xxxxxxx
     OK

   • Verify the configuration.

     # named-checkconf /etc/named.conf

     If the configuration is correct, the command will not return any output.