Learning Articles
Stay informed with expert insights, guides, and updates on safe and reliable internet browsing.
Latest Articles
Jul 30, 2025 
How to Enforce SafeSearch with DNS Filtering
Enforce SafeSearch on Google, YouTube restricted mode, and Bing strict search across your entire network with a single DNS filtering configuration.
May 28, 2025
DNS Logging: Setup, Analysis, and Compliance Guide
DNS logging and monitoring enable threat detection, performance tuning, and GDPR/HIPAA compliance. Complete setup guide with analysis best practices.
Apr 16, 2025
Anycast vs Unicast: Choosing the Right DNS Deployment
Anycast offers DDoS resilience and lower latency; Unicast gives you routing control. Compare both DNS deployment models to pick the right architecture.
Apr 10, 2025
Anycast vs Unicast DNS: Architecture Comparison Guide
Anycast and Unicast DNS architectures differ in speed, scalability, and DDoS resilience. A complete comparison to choose the right DNS routing for your network.
Mar 28, 2025
DNS Performance and Routing: Optimization Guide
Slow DNS adds latency to every page load. Optimize performance with caching, prefetching, and Anycast routing to cut DNS lookup times significantly.
Mar 10, 2025
Category-Based DNS Filtering: How It Works
Category-based filtering groups websites into categories like adult, malware, and social media for precise DNS access control. See how filter categories work.
Mar 03, 2025
DNS Filtering Troubleshooting: Common Issues and Fixes
False positives, slow lookups, and bypass attempts are the top DNS filtering problems. This guide walks through each issue with proven solutions.
Jan 29, 2025
Internet Safety for Libraries: DNS Filtering & CIPA Compliance
CIPA compliant DNS filtering for public libraries. Protect patrons, meet E-rate requirements, and block harmful content while preserving privacy.
Jan 08, 2025
5 Ways DNS Security Protects Your Business Network
Business internet filter powered by DNS security stops phishing, botnets, and data leaks before they reach your network. 5 proven protection strategies.
Nov 28, 2024
Third-Party DNS: Benefits, Drawbacks, and Risk Mitigation
Should you outsource DNS resolution? Weigh the benefits of third-party DNS infrastructure against vendor lock-in, latency, and security risks.
Nov 07, 2024
Encrypted Client Hello (ECH): Impact on Content Filtering
Encrypted Client Hello (ECH) hides SNI data, breaking inline content filters. See how ECH impacts DNS-based filtering and strategies to adapt your network.
Mar 18, 2024
PornHub Blocks US States Over Age Verification Laws
PornHub has blocked access in Texas, Montana, North Carolina, and other states rather than comply with age verification laws. The trend is accelerating.
Jan 22, 2024
DNS Content Filtering vs Web Filtering: A Full Comparison
DNS filtering vs web filtering: compare content filtering methods including browser-based, application-based, and network-level filters side by side.
Dec 01, 2023
DNS for Network Security: A Layered Defense Guide
Protective DNS adds a critical security layer to your network, blocking malware and phishing at the resolver level. A complete guide to DNS security defense.
Oct 26, 2022
Chrome Breaks Encrypted DNS on macOS Ventura: Fix
Chrome ignores macOS Ventura's native encrypted DNS profiles, breaking DoH and DoT for managed devices. Here is the workaround for IT administrators.
Oct 12, 2022
DNS Security Landscape: Top Attacks and How to Stop Them
DNS attacks like poisoning, hijacking, and tunneling threaten every network. See how each attack works and proven strategies to stop them with DNS security.
Sep 06, 2022
What Is a DNS Firewall? Protective DNS for Every Network
A DNS firewall uses protective DNS to block malware, phishing, and C2 threats at the network level. See how RPZ feeds and DNS security defend every network.
Aug 04, 2022
DNS Communication Hierarchy: How DNS Priority Works
Applications, devices, and routers each set DNS independently. Understanding this priority hierarchy is essential for effective content filter deployment.
May 16, 2022
4 Types of Content Filtering: Which One Is Right for You?
Content filtering comes in 4 types: network-based, browser-based, application-based, and service-based. Compare each to find the right web filtering method.
May 09, 2022
DNS Encryption Explained: DNSSEC, DoH, DoT, and DNSCrypt
DNS encryption protects your queries from eavesdropping and tampering. Compare DNSSEC, DNS-over-HTTPS, DNS-over-TLS, and DNSCrypt protocols side by side.
May 02, 2022
6 Ways Network Admins Use Content Filtering
Network administrators rely on DNS-based content filtering to block threats, enforce compliance, and boost productivity. Here are 6 essential strategies.
Apr 11, 2022
5 Benefits of DNS-Based Content Filtering
DNS-based content filtering is platform agnostic, easy to deploy, and works at the network edge. Here are 5 key benefits for families and organizations.
Nov 15, 2021
IPv6 and Content Filtering: Closing the DNS Gap
IPv6 can silently bypass your DNS content filters if left unconfigured. Close this security gap by updating your IPv6 DNS settings and firewall rules.
Nov 08, 2021
How Ad Tracking Domains Affect Site Performance
Blocking ad and tracking domains with DNS filtering can break site functionality. Here is what goes wrong and how to whitelist the right domains.
Sep 07, 2021
VPNs and Content Filtering: Why VPNs Bypass DNS Filters
VPNs bypass DNS content filtering by tunneling traffic past your network controls. Proven strategies to block VPN usage and maintain filtering policies.
Aug 19, 2021
Browser Extensions: A Gateway to Bypass Content Filters
VPN and proxy browser extensions let users bypass content filters in seconds. Restrict extension installs on managed devices to close this security gap.
Aug 17, 2021
Encrypted DNS Explained: What Parents Need to Know
DNS-over-HTTPS encrypts DNS queries for privacy but can bypass parental controls. Understand how encrypted DNS works and what it means for your family.
Aug 11, 2021
How Encrypted DNS Bypasses Content Filters (And Fixes)
DNS-over-HTTPS and DNS-over-TLS let browsers bypass your content filters silently. Here is how it works and the steps you can take to block this loophole.
Jun 23, 2021
Online Porn Ranks #2 for Harmful Content Reports
Reports Harmful Content (RHC) data shows online pornography is the second most reported category of harmful internet content, behind only scams and fraud.
Mar 05, 2021
Utah Content Filtering Law: What H.B. 72 Means for You
Utah's H.B. 72 requires default content filtering on every mobile device sold in the state. Here is what the law mandates and how it affects consumers.
Oct 05, 2020
What Is Browser Hijacking? How DNS Protects You
Browser hijacking redirects your searches and homepage without consent. A DNS firewall blocks hijack domains before they load, stopping the attack early.
Feb 07, 2020
Cisco Umbrella Alternative: CleanBrowsing vs OpenDNS
Compare Cisco Umbrella pricing and features with CleanBrowsing. Get the same DNS filtering protection at a fraction of the cost with easier deployment.
May 06, 2019
Age Verification Laws: Government Crackdown on Online Porn
From the UK's Online Safety Act to US state-level age verification bills, governments worldwide are passing laws to restrict access to online pornography.
Sep 25, 2018
Phishing Campaign Against K-12 Schools and Universities
K-12 schools and universities face targeted phishing attacks impersonating administrators. See real examples and how DNS protection stops these threats.