Configuring Let's Encrypt SSL on IIS for External Access

Setting up a website on IIS and securing it with a Let's Encrypt certificate is a major step, but it can be highly frustrating when the site is secure locally but shows security warnings to external visitors. This common issue usually stems from misconfigured bindings, firewall blocks, or dynamic DNS routing. Through this text-only course, you will gain a clear, step-by-step framework to diagnose and fix external SSL connection issues on your web server. You will learn how to align your network settings with your IIS configuration so that your HTTPS certificate works flawlessly for everyone on the internet. What you'll learn: - Understand the core concepts of SSL/TLS, port bindings, and how Let's Encrypt validates domain names. - Configure IIS site bindings correctly for both local testing and public external domains. - Troubleshoot firewall rules, port forwarding, and network routing to allow HTTPS traffic. - Resolve dynamic DNS and No-IP mapping conflicts that disrupt certificate validation. - Inspect and fix mixed content issues and certificate chain errors using web diagnostics. - Apply modern security practices, including automated renewals and securing TLS protocols. You will begin by learning foundational web hosting and encryption terminology, then systematically work through network configurations, firewall adjustments, and IIS binding settings. This course is designed for beginner system administrators, web developers, and tech enthusiasts hosting their own sites, requiring only basic computer literacy to get started. Equip yourself with the skills to make your self-hosted IIS website secure and professional for the entire world.