Worked on the cloudflare/cloudflare-docs repository to enhance SSL/TLS troubleshooting documentation, specifically targeting Error 521 scenarios. Focused on improving user guidance by adding a clear port-binding verification step, the update clarified that origin servers must listen on Port 80 for Flexible mode and Port 443 for Full or Full Strict modes. This documentation change, implemented in Markdown, aimed to reduce misdiagnosis and support time by making troubleshooting steps more explicit. Leveraged technical writing and troubleshooting skills to co-author the update, ensuring that users could more efficiently identify and resolve origin binding issues when encountering Error 521 with Cloudflare.