Overview

DNS filtering helps MSPs protect client networks from online threats, ensure compliance, and streamline operations. The solution blocks harmful domains and prevents malware and phishing attacks across various industries. With 72% of businesses reporting DNS attacks, having a structured implementation approach is critical.

Phase 1: Evaluating Client Needs

Start by understanding each client's specific requirements:

• Identify content filtering goals based on client type (educational, healthcare, business, family)
• Assess security and compliance requirements (HIPAA, CIPA, GDPR)
• Conduct surveys and analyze network usage patterns

Phase 2: Choosing a DNS Filtering Solution

Essential features to look for:

• Predefined filters and custom block/allow lists
• Safe search enforcement
• Encrypted DNS support (DoH, DoT)
• API access for automation
• Multi-tenant management
• Integrated reporting and analytics

Phase 3: Setting Up Policies

Configure filtering policies that match client needs:

• Configure per-user, per-router, or category-based filtering
• Enable encrypted DNS protocols (DoH, DoT)
• Apply hierarchical rules across departments and locations

Phase 3b: Deploying the Windows Endpoint Client

For Windows environments, CleanBrowsing offers a desktop app that enforces DNS filtering at the device level — useful for roaming laptops, work-from-home machines, or any device that moves off the managed network.

The app supports fully silent MSP deployment via Intune or any RMM tool. Key deployment options:

• Pass /account=, /pin=, /protect=1, /blocknet=1, and /harden=1 as installer parameters — the app applies them silently on first launch
• Browser DoH hardening locks Chrome, Edge, Brave, and Firefox so they can't route DNS around the filter
• DNS tamper detection re-applies the correct config within 5 seconds if anyone changes DNS settings manually
• Use /noupdate=1 to suppress in-app updates and manage rollouts through Intune
• Emergency reset via /reset=1 — push through Intune to undo all restrictions on a device without physical access

See the Windows App Intune Deployment Guide for full step-by-step instructions, including package preparation, install/uninstall commands, and detection rules. For a broader multi-platform rollout strategy, see the IT Admin Deployment Guide.

Phase 4: Testing and Monitoring

Verify everything works before going live:

• Verify policy enforcement against blocked and legitimate sites
• Monitor DNS query response times (target: under 50ms)
• Track filtering latency and network throughput
• Establish analytics dashboards for security and performance metrics

Phase 5: Managing and Maintaining

Ongoing maintenance ensures long-term effectiveness:

• Review block lists monthly and allow lists quarterly
• Use threat intelligence feeds for emerging threats
• Provide client training on policy management and threat awareness

Results You Can Expect

Organizations implementing DNS filtering through a structured approach have reported a 30% drop in bandwidth usage and a 92% reduction in malware incidents within three months. A well-planned deployment not only protects clients but also reduces support overhead for MSPs.