A
Anti-bot
antibot system
protection
Software systems that detect automated traffic: Cloudflare, Akamai, PerimeterX, Datadome, Imperva. They analyse headers, fingerprints, TLS handshakes, behavioural patterns. The harsher the anti-bot, the more expensive the proxy you need (residential/mobile instead of datacenter).
C
Captcha
protection
A "human or bot" test: reCAPTCHA, hCaptcha, Cloudflare Turnstile, FunCaptcha. Solved through services like 2captcha or Anti-Captcha (~$1-3 per 1000 captchas).
Cloudflare
protection
The most widespread anti-bot and CDN. Protects ~25% of the internet. Several tiers: Cloudflare WAF (regular), Bot Management (paid), Turnstile (the new captcha as of 2024).