You are connecting to a port (like 443) expecting a VPN handshake, but a web server (Nginx/Apache) is sitting on that port instead. The Fix: Double-check your Remote IP and Port in your config file.
Check for conflicting drivers from other tools like or old Z3X drivers that might be hijacking the port. Hardware & Port Checks : handshaking... error unexpected response 0x68
Look at the server-side logs. If the server says "Invalid Request," the client is the problem. If the server log is empty, the traffic isn't even reaching it. You are connecting to a port (like 443)
Handshake errors often stem from "ghost" drivers or incompatible USB filters. Hardware & Port Checks : Look at the server-side logs
: This specific response often indicates that the device has already booted past the required stage or that the connection was interrupted by a driver conflict. Potential Causes & Fixes