Differences between the three properties for obtaining the user IP address (HTTP_X_FORWARDED_FOR, HTTP_VIA, REMOTE_ADDR) I. No proxy server is used: REMOTE_ADDR = Your IP HTTP_VIA = no value or no display of HTTP_X_FORWARDED_FOR = no value or no display of 2. Use of transparent Proxy Server: transparent Proxies REMOTE_ADDR = last Proxy Server IP HTTP_VIA = Proxy Server IP www.2cto.com route = your real IP address. When you pass through multiple proxy servers, this value is similar to: 203.98.182.163, 203.98.182.163, and later. This type of proxy server still forwards your information to your access object, which cannot hide your real identity. Iii. Normal Anonymous proxy server: Anonymous Proxies REMOTE_ADDR = last Proxy Server IP HTTP_VIA = Proxy Server IP HTTP_X_FORWARDED_FOR = Proxy Server IP, when multiple proxy servers pass through, this value is similar to the following: 203.98.182.163, 203.98.182.163, 203.129.72.215. Your real IP address is hidden, but you are disclosed to the access object that you use the proxy server to access them. Iv. Use of fraudulent proxy servers: Distorting Proxies REMOTE_ADDR = Proxy Server IP HTTP_VIA = Proxy Server IP www.2cto.com HTTP_X_FORWARDED_FOR = random IP address. When passing through multiple proxy servers, this value is similar to the following: 203.98.182.163, 203.98.182.163, 203.129.72.215. It tells the access object that you used the proxy server, but fabricated a false random IP address instead of your real IP address to cheat it. 5. Use of highly anonymous proxy servers: High Anonymity Proxies (Elite proxies) REMOTE_ADDR = Proxy Server IP HTTP_VIA = no value or no display of HTTP_X_FORWARDED_FOR = no value or no display, when multiple proxy servers are used, the value is as follows: 203.98.182.163, 203.98.182.163, 203.129.72.215. The proxy server information replaces all your information, just as you directly access the object using the proxy server.