Check For Proxy Detection

Check for Proxy Detection using different kinds of proxies to hide their identity. Some are more valued by fraudsters than others because they make it harder to detect or cause suspicion. For example, datacenter IPs (which often appear as suspicious to websites) are very common among fraudsters, whereas residential proxies are less valuable, as the servers they connect through won’t immediately know that there’s a proxy involved.

Many proxies hide their origin by adding specific headers to requests, such as X-Forwarded-For or Forwarded. A simple ping test can be used to determine if a browser is connecting via a proxy. However, ping tests can be faked or spoofed with tools like WebRTC, which allows direct peer-to-peer communication between users without going through a proxy.

How to Check for Proxy Detection: Tools and Tips

Another good way to check if a user is using a proxy is by checking the operating system advertised in the browser’s User-Agent. If the browser’s User-Agent matches a different one, that’s a strong indicator that the user is using a proxy.

Another way to identify a proxy is by checking it with an IP database, such as IP2Location. Most of these databases are paid services, but some allow a certain number of free checks per day. Finally, a quick and reliable method to detect proxy usage is by running a DNS query on the requesting IP address, which will return information about the server that the request came from.