This was a primary "crack" or bypass technique in 2021 write-ups: Start Tunnel ngrok tcp 4444 Note Public URL : Identify the assigned hostname (e.g., 0.tcp.ngrok.io ) and port (e.g., Payload Generation : Create a payload (e.g., using is set to the ngrok hostname and is the assigned ngrok port. : Set up a local listener (like or Metasploit) on your local port 5. Security Risks and Abuse Agent CLI Quickstart - ngrok documentation
If you are looking for a "crack" for ngrok, it is important to know that ngrok is a SaaS (Software as a Service) ngrok crack 2021