CISA technical guidance: adding authorized sources to Protective DNS
Step-by-step CISA instructions explain how organizations add authorized IP sources and source sets to a Protective DNS resolver, note required fields, permission requirements, and that CIDR blocks and bulk loading are not supported.
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The Cybersecurity and Infrastructure Security Agency (CISA) provided a procedural walkthrough explaining how organizations add authorized sources to a Protective DNS resolver so they can route traffic through the service and receive protection. The presenter said an authorized source is a collection of IP addresses that can access the protective resolver and that every organization needs at least one authorized source to use the service.
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