DNS Security and Infrastructure Guide
The Domain Name System (DNS) is one of the most critical components of the Internet. Every website visit, email delivery, and cloud connection depends on DNS resolution.
The Domain Name System (DNS) is one of the most critical components of the Internet. Every website visit, email delivery, and cloud connection depends on DNS resolution.
This guide explains how DNS works, how DNS security technologies protect the Internet, and how modern DNS infrastructures operate at scale. The topics below are organized into learning sections covering DNS fundamentals, DNSSEC security mechanisms, encrypted DNS protocols, Protective DNS filtering, and large-scale DNS operations.
Learn the basic concepts behind DNS resolution and how domain names are translated into IP addresses.
DNSSEC protects DNS responses from manipulation and prevents cache poisoning attacks using cryptographic signatures.
Modern DNS protocols encrypt DNS traffic to protect user privacy and prevent network interception.
Protective DNS technologies block malicious domains and prevent connections to malware infrastructure, phishing sites, and botnet command-and-control servers.
Operating DNS infrastructures at scale requires distributed architectures, telemetry, monitoring and high-performance resolvers.
Planisys develops and operates large-scale DNS infrastructures and Protective DNS platforms used by enterprises, governments and Internet service providers to protect networks against cyber threats.
Learn more about the Planisys DNS Firewall platform.