Detect proxy connection online is important for businesses to catch harmful agents who spoof connection details in order to commit fraud and other malicious activity. Luckily, there are numerous ways to detect proxy connections, including captcha, reverse proxy detection, JavaScript fingerprinting, HTTP Headers and more.
One of the most reliable ways to identify a proxy is by checking the visitor’s IP against a database of known proxy IP addresses. Another way is by looking for a particular port which is used by proxies to connect to the internet, such as well-known proxies’ open ports like 22 or 3128. In addition, proxies often need to glue together two TCP/IP connections in order to make it look like the browser is communicating directly with the web server. This will cause the latency to be slightly higher than the one of a direct connection.
Detect Proxy Connections Online: Tools and Techniques
Another method is to check the HTTP headers sent by the visitor’s browser for headers such as X-Forwarded-For or Via. If these headers are present, then the website can assume that the visitor is using a proxy.
Finally, it is also possible to identify a proxy by looking at the device information advertised by the browser’s User-Agent. This can reveal a lot of information about the device, such as whether it is a mobile or desktop computer, and what operating system it is running on. If the operating system doesn’t match the advertised one, then this is a strong indicator that the visitor is using a proxy.