How anti-bot systems work.
The scripts, cookies and challenges behind the bot protection you meet most, vendor by vendor, written from the work of solving them.
How Akamai Bot Manager works: sensor data, _abck and sbsd explained
How Akamai Bot Manager decides: the v3 sensor, sbsd and pixel scripts, the _abck and bm_sz cookies, what sensor_data holds, and how to debug a rejected session.
Read the guide →DataDomeHow DataDome works: the interstitial, the slider and the datadome cookie
How DataDome blocks bots: the 403 page and its dd object, the interstitial device check, the slider captcha, tags.js beacons and how to debug a failed solve.
Read the guide →IncapsulaHow Incapsula reese84 works: Imperva's script, token and cookies explained
How Imperva's reese84 works: spotting it, the bytecode script, the sensor it posts, the token and its renewal, server-side checks, and a debugging checklist.
Read the guide →PerimeterXHow PerimeterX (HUMAN) works: the sensor, the collector and _px3 explained
How PerimeterX (HUMAN) works: the sensor script, collector posts, the commands that bake _px2 and _px3, what it fingerprints, and how to debug blocks.
Read the guide →Queue-itHow Queue-it BotDeflector works: the challenge in front of the waiting room
How Queue-it's BotDeflector checks visitors before the waiting room: the flow token, the icon challenge, the 2.2 s submit floor, error codes and debugging.
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