Cloudflare Zero Trust Access

Replace VPN with identity-based access to internal apps — SSO, device posture, and per-app policies.

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Why

Zero Trust Access authenticates every request against your IdP (Google, Okta, GitHub) — no VPN, no network access, just app-level auth. Free for 50 users. Eliminates VPN helpdesk tickets and lateral movement risk.

When

Use for internal dashboards, admin panels, staging envs, and SSH/DB access. Avoid for apps already public with their own auth (redundant) or consumer apps.

How

1. Enable Zero Trust — dash.cloudflare.com → Zero Trust (free 50 users) 2. Add IdP — Settings → Authentication → Google/Okta/GitHub SSO 3. Create app — Access → Applications → Self-hosted, set domain 4. Policy — allow by email/domain/group, require MFA, device posture 5. Tunnel — connect origin via cloudflared tunnel (no public IP) 6. Test — visit app URL, redirected to IdP login, then app 7. SSH/DB — use cloudflared access with short-lived certs

Example

# Access policy (Terraform) — allow engineering team to Grafana resource "cloudflare_access_application" "grafana" { zone_id = var.zone_id name = "Grafana" domain = "grafana.internal.example.com" type = "self_hosted" session_duration = "24h" } resource "cloudflare_access_policy" "eng_only" { application_id = cloudflare_access_application.grafana.id zone_id = var.zone_id name = "Engineering only" decision = "allow" include { email_domain = ["example.com"] group = [cloudflare_access_group.engineering.id] } require { mfa = ["non_interactive"] } } # SSH via Access — short-lived cert cloudflared access ssh --hostname ssh.internal.example.com

Common Problems

⚠IdP sync delay — group membership changes take minutes to propagate, plan ahead
⚠Session too long — 24h session means revoked users keep access, use 1-4h for sensitive apps
⚠Device posture not enforced — WARP client needed, without it posture checks skip

Best Practices

✓Require MFA for sensitive apps — Access supports TOTP, WebAuthn, Duo
✓Use short sessions (1-4h) for admin apps — limits damage of stolen session
✓Combine with Tunnel — origin never internet-exposed, double protection

FAQ

What is Cloudflare Zero Trust Access and what problem does it solve?

Replace VPN with identity-based access to internal apps — SSO, device posture, and per-app policies. It lets developers deploy, store, and scale without self-managing infrastructure — a core reference for cloud service selection.

How do I get started with Cloudflare Zero Trust Access in 5 minutes?

Two steps to run it: (1) Enable Zero Trust — dash.cloudflare.com → Zero Trust (free 50 users); (2) Add IdP — Settings → Authentication → Google/Okta/GitHub SSO. Validate on the free tier first, then wire into production.

What is the #1 pitfall with Cloudflare Zero Trust Access?

The most frequent issue is: IdP sync delay — group membership changes take minutes to propagate, plan ahead. Run a pre-launch checklist item by item, and add policy/config scanning in CI.

What are the best practices for Cloudflare Zero Trust Access?

Best practices for Cloudflare Zero Trust Access include: Require MFA for sensitive apps — Access supports TOTP, WebAuthn, Duo; Use short sessions (1-4h) for admin apps — limits damage of stolen session; Combine with Tunnel — origin never internet-exposed, double protection. The first one — "Require MFA for sensitive apps — Access supports TOTP, WebAuthn, Duo" — should be a team default baked into your IaC templates.

How do I control cost and avoid bill surprises with Cloudflare Zero Trust Access?

Three ways to prevent overspend: (1) tag every resource with env/team and enable billing alarms; (2) set budget thresholds to trigger Slack/email alerts; (3) review idle resources in Cost Explorer regularly and clean them up. Most Cloudflare Zero Trust Access options offer a free tier — validate within free quota before scaling.