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implementing-zero-trust-dns-with-nextdns

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Configure NextDNS as an encrypted (DoH/DoT) zero trust DNS resolver that blocks malicious, phishing, and cryptojacking domains via real-time threat intelligence, detects DNS rebinding and CNAME cloaking, and enforces organizational DNS policy across endpoints. Use when deploying DNS-layer threat blocking and acceptable-use enforcement, or when extending zero trust controls (including Windows 11 Zero Trust DNS) to the DNS resolution path.

skills/implementing-zero-trust-dns-with-nextdns/SKILL.md

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# Implementing Zero Trust DNS with NextDNS

## Overview

NextDNS is a cloud-based DNS resolver that provides encrypted DNS resolution (DNS-over-HTTPS and DNS-over-TLS), real-time threat intelligence blocking, ad and tracker filtering, and granular DNS policy enforcement. In a zero trust architecture, DNS is a critical control point -- every network connection begins with a DNS query, making DNS filtering an effective layer for blocking malicious domains, preventing data exfiltration via DNS tunneling, enforcing acceptable use policies, and gaining visibility into all network communications. NextDNS processes queries using threat intelligence feeds containing millions of malicious domains updated in real-time, blocks cryptojacking and phishing domains, detects DNS rebinding attacks, and supports CNAME cloaking protection. For enterprise environments, Microsoft's Zero Trust DNS (ZTDNS) feature on Windows 11 extends this concept by enforcing that endpoints can only resolve domains through approved protected DNS servers.


## When to Use

- When deploying or configuring implementing zero trust dns with nextdns capabilities in your environment
- When establishing security controls aligned to compliance requirements
- When building or improving security architecture for this domain
- When conducting security assessments that require this implementation
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