Installing and configuring DNS servers under Linux

1.DNS Concept:

In a nutshell, DNS is a 53-port service on the system that provides the conversion of domain names and IP addresses to each other. For example, you visit www.csdn.net, the router is impossible to know this address, you need to connect to the DNS server first, the DNS server will return the Www.csdn.net IP address, so that the network can be normal route. Reverse resolution is used to prove that your IP address is recognized, especially to protect against bogus mail server flooding.

2. Detailed configuration:

Installing and configuring DNS servers under Linux