Block
DNS Filtering as a Service​
DNS filtering uses the Domain Name System (DNS)
to block malicious websites and filter harmful
or inappropriate content.
to block malicious websites and filter harmful
or inappropriate content.
![](http://www.technolutions.co.za/wp-content/uploads/2024/07/slider-img-4.png)
Why your business needs DNS Filtering
Security
Reduces risks of malware infections, phishing attacks, and data breaches.
Content Control
Enforces policies by blocking inappropriate or non-work-related content.
Compliance
Helps meet regulatory requirements and protect sensitive data.
Productivity
Ensures employees focus on work-related sites.
How does DNS filtering work?
![](https://www.technolutions.co.za/wp-content/uploads/2024/07/resolvers-300x200.png)
DNS Resolvers
- All DNS queries are directed to DNS resolvers.
- These resolvers can be configured to filter queries by refusing to resolve requests for certain domains.
![](https://www.technolutions.co.za/wp-content/uploads/2024/07/blockers.png)
Blocklists
- DNS filtering services maintain a list of domains associated with malware, phishing, or other threats.
- When a query matches a domain on the blocklist, the DNS resolver blocks the request, preventing access.
![](https://www.technolutions.co.za/wp-content/uploads/2024/07/allower.png)
Allowlists
- Alternatively, DNS filtering can use an allowlist to specify safe domains.
- Any domain not on the allowlist is blocked, ensuring only approved sites are accessible.