---
description: Secure Internet traffic and SaaS apps.
title: Build DNS security policies
image: https://developers.cloudflare.com/og-docs.png
---

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# Build DNS security policies

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/learning-paths/secure-internet-traffic/build-dns-policies/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

DNS security is an important, wide-reaching, and early action in the lifecycle of a request. Cloudflare operates one of the world's largest and fastest public DNS resolvers. Your users' public DNS requests will be resolved by that same resolution engine -- whether they are connecting from a network pointing its resolvers to Cloudflare or an endpoint running the Cloudflare One Client.

## Objectives

By the end of this module, you will be able to:

* Create your first Gateway DNS policy.
* Build an allow or block list for use in firewall policies.
* Onboard networks to Gateway to filter DNS queries.

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