DNS (Domain Name System)

The Domain Name System (DNS) translates domain names into IP addresses, enabling web navigation and network operations.

DNS Implementations

BIND (Linux)

BIND (Berkeley Internet Name Domain) is one of the most widely used DNS implementations on Linux. It is configured through zone files and a main configuration file (named.conf).

Basic configuration example in /etc/named.conf:

options {
    directory "/var/named";
    allow-query { any; };
};

IIS (Windows)

In Windows environments, DNS is typically managed using Microsoft DNS Server and administration tools in the Windows ecosystem.

DNS Zone Types

• Master zone: Contains original records and distributes data to secondary DNS servers.
• Slave zone: Replicates records from a master zone and responds to DNS queries.

Zone definition example in BIND:

zone "example.com" IN {
    type master;
    file "/etc/bind/db.example.com";
};