The essentials about DNS - In 2 minutes

Every web player needs to master these points!

By mastering DNS, you will FREE with your websites and domain names! 👇

Learn the essentials in 2 intense, effective minutes instead of a boring 3-hour course. 🤯

What is the DNS system?

📄 The Domain Name System is the digital highway that makes a domain name (e.g. lrob.fr or google.com) accessible. Basically, the domain is «pointed» to a destination.

Examples:

• If you visit a domain such as lrob.fr, your web browser makes a DNS resolution request in the background to find out the IP address of the server hosting the site.
• When you send an email, other requests are made to find the recipient mail server and authenticate the sender.

How does the DNS system work?

1 - Registrar 🏢

Domain names such as lrob.fr are registered with a registrar such as HaiSoft, Gandi, NameCheap, OVH, etc.

Each registrar must go through a registry that is the authority for domain name extensions. For example :

• .fr : AFNIC
• .com / .net Verisign
• .org Public Interest Registry (PIR)

2 - NS (Name Servers) 🌍

To make a domain «resolvable» (accessible), it must have «name servers» or NS (Name Servers).

NSs contain the domain's pointer information and are referred to as «authoritative». At least two NS must always be defined for redundancy. The registrar sends this information to the registry.

ℹ️ The domain owner («registrant») is free to use the NS of their choice, or even to create their own using values called Glue Records.

Various providers exist and you can create your own directly with a little knowledge. This is the case with lrob.net, for example, which is my infrastructure domain with a complete standalone DNS system provided to all hosted customers to centralise their DNS management independently of the registrar used. How convenient!

More information about Name Servers

3 - DNS zone 🌐

⚠️ That's what you need to master!

NSs are therefore servers containing the domain's DNS zone. It is this DNS zone that contains the actual pointing values.

For example:

• the IP of the server hosting the site
• the IP or host name of the mail server
• Meta-information such as the list of servers authorised to send mail for a domain.

Discover all possible DNS values and how to manage your DNS zone via LRob.

What do we do with all this?

You are now free to register a domain name with any registrar, to manage your NS (and therefore your DNS zone) wherever you want. And your websites and emails can be placed with as many different providers as you like, with complete freedom thanks to the DNS zone settings!

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