Cloudflare Zero Trust Security Model

Overview#

Cloudflare’s Zero Trust platform replaces the traditional perimeter-based security model with identity-aware access controls.

Architecture#

The Zero Trust model operates on three core principles:

1. Verify Explicitly — Authenticate and authorize based on all available data points
2. Use Least Privilege — Limit user access with Just-In-Time and Just-Enough-Access
3. Assume Breach — Minimize blast radius and segment access

Key Components#

graph TD
    A[User Device] --> B[Cloudflare WARP]
    B --> C[Access Gateway]
    C --> D{Identity Provider}
    D --> E[Application]
    C --> F[Gateway Policies]
    F --> G[DNS Filtering]
    F --> H[Browser Isolation]

DNS Filtering#

Cloudflare Gateway provides DNS-layer security that blocks:

• Malware domains
• Phishing sites
• Command & control servers
• Content categories

This operates at the DNS resolution level, meaning protection applies before any connection is established.