Posted on August 11, 2026 in Security • Tagged with Bot Detection, Internet Bots, JavaScript • 2 min read
I launched a new little project called botstop.io. You open the page and it instantly tells you whether your browser looks like a bot, then refines the verdict a moment later. No CAPTCHA, no puzzles, just passive signals.
Posted on March 09, 2022 in Security • Tagged with API, Datacenter, Hosting, Cloud-Provider, IP API, Bot-Detection, VPN-Detection, IP-Intelligence, IP-Lookup • 8 min read
It is not entirely trivial to find out if an IP address belongs to a datacenter / cloud provider. In this blog article, I try to find an algorithm that outputs with high confidence if an IPv4 / Ipv6 address belongs to a hosting provider or not.
Posted on November 26, 2021 in Security • Tagged with proxy, proxy-detection, bot-detection, proxy-provider, anti-scraping • 8 min read
I (maybe) found another method to detect browsers that route their traffic through SOCKS/HTTP proxies. What do you think? Is this a valid method to detect Proxies? I need your help!
Posted on October 16, 2021 in Security • Tagged with proxy, proxy-detection, bot-detection, proxy-provider, anti-scraping • 14 min read
In this blog post, I demonstrate 7 different efficient ways how to detect a proxy server when the client is visiting a web server with a browser that has a proxy / VPN configured.
Posted on July 18, 2021 in Security • Tagged with Internet Bots, CAPTCHA, Bot Detection • 15 min read
There are unique challenges when developing a passive bot detecting system. In this blog article, I explain some of the obstacles that need to be overcome in order to detect advanced bots without presenting a CAPTCHA. I also explain how bot programmers can benefit from the architectural challenges that bot detection systems inherently suffer from.
Posted on June 05, 2021 in Security • Tagged with proxy-provider, bot-detection, anti-scraping • 10 min read
In this blog article I demonstrate several bullet-proof ways how to detect Brightdata Data Collector as a bot without any doubt.