How to Install DNS Server in Linux?

 

A DNS server is also known as name server and it is mainly used to get the resolution of IP address to a desired host name. When you want to install DNS server in Linux you can setup four various types of these servers including a master DNS server used for your domains and it is ideally used to store very authoritative records to your domain. The second type of DNS server is slave DNS server which you store by using the master DNS server because it is largely dependent on master DNS server. Catching only DNS server stores only the very urgent requests such as proxy server and otherwise it is referred to other DNS servers and forwarding only DNS server is referred to all other types of DNS server.


Before starting the installation process with bind for your DNS server in Linux, you must be well aware about some basic concepts on which DNS server relies. The overall host name which is used in the DNS installation with its domain is written as server.example.com is known as completely qualified domain name and the right most part which is written in the form of .com or .net is known top level domain with the remaining parts of this qualified domain name which is most often separated with intervals and we rename them as sub-domains. Then these sub-domains are most probably used to distribute the main qualified domain into different zones and the DNS information in maintained in each zone by using very authoritative name server.


Then this authoritative server which is also based on the master zone file is liable to further modified with the updated DNS information about the zone which is called primary master server or simply you can name it as master server. This zone can also use additional name servers and they are named as secondary servers or slave servers out of which secondary server is used to retrieve information about the zone by using a zone transfer facility which transfers it from master server or another secondary server. Secondary server can never modify the DNS information directly by using any means.  


Before installing the DNS server in Linux, it is advised to use chroot features which help you to protect your system from hackers. Then arrives the configuration process with the use of three systems out of which one is Linux server, one is client’s Linux and one is the client’s window. Then you can use bind and catching-nameserver which are used to configure the DNS server and after this is done you can set host name to server.example.com and IP address by using 192.168.0.254. After the configuration of DNS server, you can configure the zone files by using the example of two zone files including example.com.zone that is used for forward zone and 0.168.192.in-addr.arpa for the reverse type zone.


Then you can store the files as /var/named/chroot/var/named/location and you will use two sample files for the creation of these files. The directory of named chroot is changed by copying the sample files to the name file are used which opens into forwarded zone file as described by writing example.com.zone. Then by using the modifications and changing the ownership of these zone files to named groups you can start the named service and if you enter at a point where this service restarts without any error or bug then you make sure that you have very successfully configured the master name server for installing your DNS server into Linux.