Install and configure the DNS server in linux, and configure the dns server in linux

Install and configure the DNS server in linux, and configure the dns server in linux

1. DNS concept:

Simply put, DNS is a service on the system that uses port 53 to provide mutual conversion between domain names and IP addresses. For example, if you access www.csdn.net, the router cannot know the address. You need to first connect to the DNS server, and the DNS server will return the IP address of www.csdn.net, so that you can use the normal route on the Internet. Reverse resolution is used to prove that your IP address is recognized, especially to prevent the spread of forged email servers.

2. Detailed Configuration:

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