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Introduction to DNSSEC: Securing Your DNS Infrastructure in Linux

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The Domain Name System (DNS) is a foundational component of the internet, responsible for translating domain names into IP addresses. Despite its critical role, DNS was not designed with security in mind, making it vulnerable to a variety of attacks, including cache poisoning and spoofing. This is where DNSSEC (DNS Security Extensions) comes into play. DNSSEC is a suite of extensions that adds a layer of security to DNS by enabling authentication of DNS responses, protecting users and services from malicious redirection.

In this detailed technical blog post, we will explore the importance of DNS Security Extensions, how it works, and provide a step-by-step guide to securing your DNS infrastructure on Linux using DNSSEC.

What is DNSSEC?

DNSSEC (Domain Name System Security Extensions) is a protocol that enhances DNS by adding cryptographic signatures to DNS records. These signatures allow DNS resolvers (the systems responsible for querying DNS records on behalf of users) to verify the authenticity of the responses they receive from DNS servers.

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​How to check DNS records on Windows, Linux and macOS?

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Being an online business owner or a network administrator, checking DNS records will become a constant task for you. So better to know how to do it from now!

​How to check DNS records on Windows, Linux and macOS? 

To check DNS records on Windows, Linux, and macOS, you can use the nslookup command. This command allows you to query DNS servers for information about a specific domain or hostname. Linux and macOS have another choice to check DNS records which is the host command. Both “nslookup” and “host” work well, but the second provides more detailed statistics and more options for precise searches. We do recommend using the host command!

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Dig command: How to use it in Linux?

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What does the Dig command do?

Domain Information Groper, or DIG for short, is a wonderful command-line utility. To provide comprehensive details on mail exchanges, host addresses, and other relevant information, we use Dig to query the DNS name server. This utility is compatible with a variety of operating systems, including Linux and macOS.

You can do DNS queries using the built-in Linux Dig command by using the Terminal application. Your domain can be troubleshot, and you can learn a lot of details about it, such as DNS records, Name servers, and general network information. Its excellent features include having more functionality than some built-in utilities, like nslookup, and being quite simple to use. Because of this, despite having a straightforward command-line interface, many network administrators use it often.

The most popular examples of the Dig command!

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Popular Linux commands every beginner should know

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Linux commands – Explanation

Linux commands are Linux operating system utilities. An interface that receives lines of text and converts them into instructions for your computer is known as a command line.

In addition, we use the Linux terminal to run the commands. Similar to the command prompt in the Windows OS, the terminal is a command-line interface for interacting with the system. A graphical user interface (GUI) is simply a command-line application abstraction. 

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