💻 Deploying JA4 to Protect Against AI Bots
Methods for using the JA4 TLS fingerprinting standard to identify and block bots are considered. The author compares cloud solutions with self-hosted options, highlighting HAProxy 3.1+ with a Lua plugin as the most effective method.
🌍 The transition to protocols like ECH (Encrypted Client Hello) makes traditional traffic analysis ineffective, increasing the demand for advanced fingerprinting methods at the proxy server level. JA4 handles changes in TLS extensions (e.g., GREASE) more effectively.
👤 When managing infrastructure, implementing JA4 via HAProxy or Envoy allows for effectively distinguishing real users from AI bots and automated scanners with minimal performance loss (~5%).