Cloudflare Origin Certificate Setup Checklist
You've set up Cloudflare but your origin server still shows SSL errors or mixed content warni...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Cloudflare Error 526: Invalid Origin Certificate
If you see Error 526: Invalid SSL Certificate in Cloudflare, it means Cloudflare...
Fix Chrome Certificate Error: Invalid Authority & Date/Time Issue
You're browsing in Chrome and see a full-page warning: Your connection is not private...
How to Fix Cloudflare 521 Error with Wildcard Subdomains
If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...
Fix Cloudflare 521 Error: DNS Configuration Problem
If you see a Cloudflare 521 error page, it means Cloudflare's servers are unable to connect t...
Fix Chrome Certificate Error: Invalid Authority with Proxy Settings
You open Chrome and see NET::ERR_CERT_AUTHORITY_INVALID on every site, even trus...
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