Engineering•9 min read
Bypassing Modern Bot Detection in 2025
Daniel Park
Dec 14, 2024
The Detection Stack
Bot detection has moved well beyond IP reputation. Modern stacks combine TLS fingerprinting (JA3/JA4), HTTP/2 fingerprints, headless browser markers, and behavioral telemetry. Beating one signal is no longer enough.
What Works
Real-browser automation with Playwright + curl-impersonate covers TLS and protocol layers. Add residential exit nodes for IP reputation and you cover the bottom three layers of the stack.
What Doesn't
Plain Selenium with vanilla User-Agent rotation. Datacenter IPs against tier-1 SERP. Anything that ignores the rendering signals captured by client-side JS.
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