In this video we'll be covering how to troubleshoot some common TLS handshake problems using Wireshark. We'll review what a healthy handshake looks like, then dive into three failure scenarios: 1 - The target server is not running TLS on the specified port 2 - The target server does not accept the client's TLS version or cipher list 3 - The client does not accept the server's TLS certificate Additional resources: - An illustrated step-by-step guide to the TLS 1.2 handshake - TLS1.2 RFC (Request for Comments) - Tool for testing public-facing TLS servers - Site featuring various misconfigured SSL pages, useful for testing