Creating a DNS system to create a DNS private root: DNS family six

We now have a lot of knowledge about DNS from the previous blog, today we use a comprehensive experiment to string up the previous content to review, this interesting experiment is the private root of DNS. A private root is a DNS root server created by the individual or enterprise itself, which belongs to the creator private and cannot serve as many netizens as the root server on the Internet. So why would a company build a private root? Isn't it nice to use the root server directly on the Internet? The need to build a private root is generally the following reasons, for example, some units such as police or military departments for confidentiality needs, the unit must be the network and the Internet physical isolation, but do not want to use IP address to access each other, so you must use the DNS private root to ensure the normal application of domain names; and some large enterprises in order to manage conveniently, Also in the enterprise set private root resolution domain name, so you can save to the public network to apply for domain name trouble.

For us, the purpose of creating a private root is to better understand the architecture of DNS through these operations, and to experience the birth of DNS in person. Here we are going to use five virtual machines to implement a private DNS root, the topology as shown in the following figure, Florence as the root of the private root server, the root server to the. com Zone Resolution authority delegated to the Berlin, the. NET zone's resolution authority delegated to Firenze. Then Berlin the resolution of the Hexun.com delegate to the Istanbul, and Firenze homeway.net of the resolution delegated to Perth. The fully qualified domain name and IP address of each server are annotated in the topology map.

A DNS server that is responsible for the root domain

We put the creation of root server this great task to Florence, the birth of the private root server announced that we use another domain name space, and the public domain name space completely parallel to another namespace, in this own created domain name space, I You can use any domain name without worrying about conflicts with the same area on the public web. As shown in the following illustration, we select the new zone in Florence's DNS Manager to create a root domain on Florence.

The New Zone Wizard appears and click Next to continue.