"Proxies are detected in your connection" - This is the last thing you want to see when running web scrapers.
Ping-based proxy detection has actually been around for many years, but it never became widely adopted. Modern websites cannot rely on it, because doing so would ruin the experience for real users. So while this method exists in theory, it won’t meaningfully affect your scraping or multi-accounting work.
Ping-based proxy detection compares two latency measurements: how long it takes for your browser to reach a website, and how long it takes for the website’s server to ping the IP you appear to be using. If these numbers differ significantly, it suggests there may be a proxy or tunnel in between. While the method can indicate the presence of a proxy, it is unreliable because network fluctuations, routing differences, and bandwidth issues can cause similar discrepancies.
Let us explain the image below:
In the first case, the website forces your browser with JavaScript to ping the webserver. It will take a longer time since the traffic first goes to the proxy and then to the webserver. On the left side of the image, you can see that it takes 100 ms + 100 ms = 200 ms.
In the second case, the webserver is pinging the proxy. The website doesn’t even know that your PC exists. It just sees an IP. It is the Proxy’s IP. So, the ping will be much faster since it doesn’t have to travel all the way to your PC. On the right side, you can see that it just takes 100 ms.
What this method tries to conclude is that if the latency from your browser to the server is significantly higher than the latency from the server back to the IP you appear to be using, then there might be an extra “hop” in the path. In their interpretation, that additional delay suggests a possible tunnel or proxy between you and the website. It’s an assumption rather than a certainty, and the result is only a rough guess - not reliable enough for serious detection.
Ping-based detection isn’t something to worry about, because modern websites don’t block users based on it. If you want to minimize the chance of triggering it, simply use fast proxies located close to you so the latency difference stays small.
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