What is a DNS Firewall?

A DNS firewall is a cyber security defense that uses the DNS protocol to prevent endpoints from acquiring a destination IP address. This technology is also known as DNS Filtering or the modern version of it is called Protective DNS.

How does a DNS Firewall Work?

For example, the DigitalStakeout Securd DNS firewall is a proprietary DNS recursor that is a resolving DNS name server.

Our DNS firewall works by the following steps:

  1. The DNS firewall has to accept a DNS request from an approved DNS client.
  2. The DNS request will be processed through a security policy.
  3. Based on policy conditions, the DNS request will be allowed to continue or be rejected.

If the requesting client cannot resolve the host name, it will not be able to get the IP address information required to connect to its target.

DNS Firewalls Protect Against Web Delivered Cyber Threats

DigitalStakeout Securd DNS filtering provides secure Internet access for endpoints connecting directly to the Internet. It offers protection from web delivered attacks including phishing, ransomware, malware, adware and cryptomining. DigitalStakeout Securd also proactively defends against threats by enforcing zero-trust security policies, and isolating new and untrusted domains from ever being to deliver a new attack against end users and endpoints.

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