DNS filtering is the blocking or control of domain resolution requests based on policy, reputation, category, or threat intelligence. It matters because many malicious connections depend on domain resolution before they can reach phishing pages, malware hosts, or command-and-control infrastructure.
What is DNS Filtering?
By stopping risky lookups early, DNS filtering can reduce exposure to phishing, malware, policy violations, and shadow IT. It is widely used in endpoint, branch, and remote-user protection strategies.
What DNS Filtering Commonly Supports
Common uses include phishing defense, malware blocking, safe browsing, acceptable-use enforcement, and remote endpoint protection.
DNS Filtering vs. Unrestricted DNS Resolution
DNS filtering blocks or redirects risky domains during lookup. Unrestricted resolution lets endpoints resolve and attempt connection more freely.
Frequently Asked Questions
Why is DNS filtering effective?
Because it can stop many risky connections before the browser or application reaches the destination.
Does it stop every threat?
No. Direct IP use, fast-changing infrastructure, and encrypted DNS strategies can complicate it.
