What is a Private DNS server and why to use it?

Nowadays, most people and companies use Public DNS services instead of Private DNS server. This has its dangers. But before we find out what they are and why it is so important to switch to Private DNS, let’s see what a DNS server actually is.

DNS server – What does it mean?

In this global network, we distinguish many types of DNS servers (Authoritative DNS server, Recursive DNS server, etc.). However, they have one common function. The purpose of a DNS server is to translate the data sought by the user into information that computers can understand. To put it another way, its job is to translate the domain name example.com to its IP address 1.2.3.4. and then load the page. This process is called DNS resolution, and it requires many resources, one of which is the DNS server. 

What exactly is a Private DNS server?

As the title indicates, a Private DNS server seems to be something unique. Private DNS networks are those that aren’t connected to the Public DNS. Consider it a personal library with a small selection of books. This has both benefits and drawbacks. If you wish to read a specific type of book, however, you will be unable to do so. Although, there is one advantage: because your library is confidential, no one will know what you are reading.

In other words, with Private DNS, you get an additional security encryption protocol. Indeed, it hides your query on the network. In technical language, we know these as DoT (DNS over TLS) and DoH (DNS over HTTPS).

Critical components from the Private DNS server

Now, two concepts are essential when we speak for Private DNS: Transport Layer Security (TLS) and Hypertext Transfer Protocol Secure (HTTPS).

  • Transport Layer Security (TLS) – The primary purpose of TLS is to secure two-way communication between a client and a server on one side and a server on the other. Furthermore, Transport Layer Security (TLS) has completely supplanted SSL (Security Socket Layer).
  • Hypertext Transfer Protocol Secure (HTTPS) – It produces encryption codes or session keys, which must be validated by a 3rd authority. Due to the system’s security, users who do not have authorization will not be able to access the information of others.

As a result, we may claim that Private DNS encrypts queries using the TLS and HTTPS protocols. These are then transferred between the private network’s DNS server and the Public DNS server.

Advantages

A Private DNS server has a really huge amount of benefits. We will explore only one part of them. They are as follows:

  • It gives you more security! This is almost the most significant benefit of the Private DNS server. You may be more vulnerable to DoS and DDoS attacks if you use a public DNS server. However, if you employ a Private Domain Name System server, this is highly unlikely to happen.
  • Has almost all premium services. Yes, the Private Domain Name System server has nearly all premium features. For example, it could have Secondary DNS and Dynamic DNS.
  • More DNS zones and DNS records. You will be able to host as many DNS zones and DNS records as your server can handle. That is, you will be able to use all the DNS records you need (A, AAA, SOA, PTR, MX, TXT, CNAME, etc.).

Recommended article: DNSSEC: Simple guide for beginners

Conclusion

A Private DNS server is your key move for a more professional image if someone tries to evaluate your URL. Furthermore, because you have complete control over the accessible IP addresses and network access, it improves security and cost-effectiveness. Frequently, your ISP’s public DNS servers record every DNS query you make, and this information is stored for years. If you don’t want this to happen, implement a Private DNS server.

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