DNS Filtering That Blocks Threats Before They Connect

No. DNS filtering adds negligible latency to web browsing, often measured in single-digit milliseconds that users cannot perceive. In many cases, our filtering DNS servers actually resolve queries faster than default ISP DNS because they use optimized infrastructure with global points of presence. Your team browses normally while DNS filtering silently blocks malicious and inappropriate destinations before connections are even attempted.

Very difficult on managed devices. Network-level DNS filtering enforcement combined with roaming agents on endpoints prevents common bypass methods like switching to alternate DNS servers or using DNS-over-HTTPS to public resolvers. All bypass attempts are logged and visible to our monitoring team. Unmanaged personal devices on guest networks can bypass filtering, which is why we recommend separate network segments for guest traffic.

When DNS filtering blocks a legitimate website, users see a clear block page explaining the category restriction. Exception requests are submitted through our help desk and legitimate sites are whitelisted typically within hours of the request. Our team reviews blocked domains to confirm they are safe before adding exceptions. This process ensures DNS filtering accuracy improves over time while maintaining protection against genuinely malicious destinations.

No. DNS filtering complements endpoint protection but does not replace it. Each layer catches different types of threats at different points in the attack chain. SADOS recommends DNS filtering alongside EDR endpoint protection for comprehensive security coverage. DNS filtering blocks malicious connections at the network level while EDR monitors behavior on the device itself for threats that arrive through other vectors.

Lightweight roaming agents installed on managed devices direct all DNS queries through our filtered servers regardless of which network the employee connects to. Whether working from home, a hotel, an airport, or a coffee shop, DNS filtering protection follows every managed device. This ensures remote workers receive the same network-level security as employees sitting in your office, with no VPN connection required.

Yes. DNS filtering policies can be customized by department, user group, or device type to match your organizational needs. Marketing teams may need access to social media platforms that finance departments do not require. Guest networks can have stricter filtering than employee networks. We configure policies per your requirements and adjust them as your organization’s needs evolve over time.