Secure name resolution with DNS-over-TLS

What's the Name?

© Photo by Ainur Iman on Unsplash

© Photo by Ainur Iman on Unsplash

Article from Issue 277/2023

Ordinary DNS sends queries in plaintext. If you're looking for something safer, dial up the privacy with DNS-over-TLS.

In the constantly shifting terrain of network security and administration, the demand for robust privacy measures is at an all-time high. Modern organizations navigate a complex digital ecosystem, often grappling with threats that compromise the integrity of their data and communications. Enter Linux's advanced networking capabilities paired with the security fortifications of DNS-over-TLS – a fusion that promises heightened security levels. This article examines how this integration elevates network privacy, enhancing protection against potential cyberthreats while maintaining seamless communication flows in intricate digital landscapes.

The Problem

At its core, the Domain Name System (DNS) acts as the Internet's directory. Every time a user inputs a domain name into their browser, DNS is the mechanism that translates this human-readable address into a machine-recognizable IP address. For IT professionals, this is Networking 101. Every web application, every cloud service, and every remote server connection hinges on the reliable functioning of DNS.

However, a key flaw permeates traditional DNS. The process, which involves converting domain names into IP addresses, operates in plaintext. The absence of encryption exposes a significant vulnerability, as plaintext communication can be intercepted, viewed, or even manipulated by malicious actors.


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