DNS Filtering

Advanced DNS-based prevention that blocks dangerous or undesirable domains before threats reach devices or networks

Why DNS Filtering is critical for real online protection

The problem

Traditional security tools often try to neutralize threats after they have already reached a device, which is too late. Modern cyber threats include invisible malware, perfectly cloned scam pages, fraud-oriented sites, and explicit content spread everywhere. These threats are increasing in complexity, and human review alone can’t keep up. DNS, or Domain Name System, translates human-readable domains into machine addresses. By monitoring and filtering DNS resolution in advance, FlashStart stops access to undesirable domain categories before any threat can impact the network or endpoints.

  • 5mln

    access requests filtered every day across global infrastructure.

  • 304M

    pages blocked daily for security or policy reasons.

  • 24/7

    continuously inspect DNS requests and block malicious or unwanted domains before users can establish a connection.

  • 91%

    cyberattacks begin with a phishing email or a malicious web link.

  • OpenDNS unavailable in France and Portugal: why and how to fix it

    Protection and prevention

    FlashStart’s DNS Filtering technology operates at the DNS resolution level. Instead of waiting for content to load or inspecting URLs after download, it examines domain activity before resolution, blocking resolution when the domain falls into an undesirable category. This prevents attacks and unwanted browsing before they ever touch devices.

    Real protection starts with prevention: by stopping DNS resolution of bad domains, threats are neutralized at the earliest point in the connection process.

    Rather than relying only on keyword matching or outdated URL blacklists, FlashStart leverages a classification of domains into stable, trackable categories, making filtering far more accurate and effective. DNS Filtering applies to all network traffic, including links opened from emails or messages (phishing), without requiring additional software or hardware on endpoints.

    Why choose Flashstart protection

    Thanks to our global Anycast network and the use of artificial intelligence, we guarantee you immediate, reliable, and constantly updated Internet protection that is tailored to your business model.

    Designed for your organization

    Organizations

    If you’re looking for a versatile and effective security solution, the FlashStart filter is ideal for remote working environments, complex corporate networks or simple connections.

    FAQs

    Does it require software on user devices?

    No. DNS Filtering applies at the DNS layer in the cloud, protecting all Wi-Fi connected devices without endpoint agents.

    What kinds of content can be filtered?

    DNS Filtering can block malware, scams, fraud sites, inappropriate content, and even categories like social media, games, or streaming based on business policy.

    Is DNS Filtering faster than traditional filtering?

    Yes. FlashStart DNS Filtering works at the resolution level with a global Anycast

    How does DNS Filtering stop malware and phishing?

    By blocking DNS resolution for domains associated with malware, scams, and phishing sites, DNS Filtering prevents connections before malicious payloads reach devices.

    What is DNS Filtering?

    DNS Filtering analyzes DNS resolution requests and prevents access to domains classified as dangerous, inappropriate, or otherwise undesirable before any content is downloaded.

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    Other features

  • Malware Protection

    Preventive protection against malware, ransomware, phishing, botnets, fileless threats, worms, adware, and malicious websites, continuously updated by artificial intelligence.

  • Parental Control

    Web content filtering based on domain-level controls, with customizable policies for categories, users, groups, devices, locations, and schedules.

  • DNS intelligence

    Intelligent traffic analysis that detects suspicious, malicious, or inappropriate destinations before users can reach them.

  • Artificial Intelligence

    Artificial intelligence and machine learning continuously analyze, classify, and update web domains to support predictive threat detection and content categorization.