DNS Domain name Resolution Service

DNS Domain name Resolution Service

2018 10 About 23rd GAO

First, the DNS domain name resolution concept

Classification of DNS:

1. cache domain Name Server =====>> help you to find the domain name resolution, itself can not parse;

2. Primary Domain name resolution server =====>> He maintains a domain name of the interpretation of the notebook;

3. From the domain name resolution server =====>> primary Domain name resolution server backup, high availability;

4. Intelligent parsing server =====>> returns different results depending on the region;

The notebook includes two analytical records:

1. Forward parsing: domain name =====>>ip

2. Reverse parsing:ip=====>> domain name

DNS two ways of querying:

1. Recursive lookup;

2. Iterative Lookups

Second, the installation and control of Bbind

The main function of 1.RPM package

Bind: The main program and related files that provide the domain name server

Bind-utils: Provides a test utility for the DNS server, such as Nslookup

Bind-libs: Provides library functions that bind,bind-utils need to use

Bind-chroot: Provides a disguised root directory for the BIND service to improve security; also known as jail (prison) mechanism

2. Configure DNS domain name Resolution service

DNS support packages need to be installed first for both the DNS client and the server Bind,bind-chroot

Then modify the DNS master configuration file vim/etc/named.conf

Save, exit, check the configuration file, if not error, the configuration file is no problem

Start the Domain Name resolution service

To see if the listening port is open

Modify the client temp file to change IP to server IP address

Finally, the DNS domain name resolution service is configured to complete, and the client ping www.baidu.com,ping-pass instructions are configured successfully.

DNS Domain name Resolution Service