Wikiversity

Data Networking/Spring 2015/GROUP4/DNS-SERVER

< Data Networking | Spring 2015 | GROUP4

STEPS TO CONFIGURE DNS=

edit

Assign permanent IP through to the DNS server:

IP assigned to the DNS is 192.168.5.6


Install Bind:

Use the following command to install bind9 

 sudo apt-get install bind9 bind9utils bind9-doc
 sudo apt-get install dnsutils

Edit the resolv.conf file 

  nano /etc/resolv.conf

edit the hosts file 

  nano /etc/hosts


Edit the options file:

It is done to configure the primary DNS. The command used is- 

 sudo nano /etc/bind/named.conf.options
 forwarders {
        192.168.5.6;
        192.168.5.7;
 }

Configure the local file:

Use the command shown below to access the file. 

 sudo nano /etc/bind/named.conf.local

Once the file opens, configure the forward and reverse lookup zones.


Create zone directory and forward and reverse files:

To create the zone directory, use the command- 

 sudo mkdir /etc/bind/z

Copying the content 

 sudo cp /etc/bind/db.local/etc/bind/z/db.for

The forward lookup zone does hostname > IP address translation and reverse lookup zone does IP address > hostname translation.

Our forward lookup zone file is db.for.com.

Edit the forward lookup zone file by a command specifying the path 

 sudo nano /etc/bind/z/db.for

Copying the content 

 sudo cp /etc/bind/db.127/etc/bind/z/db.192

Our reverse lookup zone filename is db.192

Edit the reverse lookup zone file by a command specifying the path 

sudo nano /etc/bind/z/db.192


Restart bind:

Finally, restart bind to load the server. Use the command- 

 sudo service bind9 restart

Testing

edit

Checking of the forward and reverse zone files

Use the following commands-

  • for forward lookup zone
 sudo named-checkzone mvrs.com /etc/bind/z/db.for
  • for reverse lookup zone
 sudo named-checkzone mvrs.com /etc/bind/z/db.192


Checking reverse lookup zone:

Use the command- 

nslookup 192.168.5.6

This shows the hostname for the IP address as vivek.fabfour.com which is the name server of Fabfour.

Checking forward lookup zone:

Use the command- 

nslookup mvrs.com

This shows the IP address of the host as 192.168.5.9 which is the IP address of the webserver.

Checking host file:

Use the command- 

 host -l mvrs.com

this will show all the hosts.

Using dig command: 

dig mvrs.com
Retrieved from "https://en.wikiversity.org/w/index.php?title=Data_Networking/Spring_2015/GROUP4/DNS-SERVER&oldid=2581882"