Differences between the three properties for php to obtain ip addresses (HTTP_X_FORWARDED_FOR, HTTP_VIA, REMOTE_ADDR)

I. No proxy server is used:

REMOTE_ADDR = your IP address
HTTP_VIA = no value or no display
HTTP_X_FORWARDED_FOR = no value or no display

Ii. Transparent proxy server: Transparent Proxies

REMOTE_ADDR = IP address of the last Proxy Server
HTTP_VIA = Proxy Server IP Address
HTTP_X_FORWARDED_FOR = your real IP address. When multiple proxy servers are used, this value is similar to the following: 203.98.1820.3, 203.98.1820.3, 203.129.72.215.

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 = IP address of the last Proxy Server
HTTP_VIA = Proxy Server IP Address
HTTP_X_FORWARDED_FOR = Proxy Server IP address. When multiple proxy servers are used, this value is similar to the following: 203.98.1820.3, 203.98.1820.3, 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. destorting Proxies

REMOTE_ADDR = Proxy Server IP Address
HTTP_VIA = Proxy Server IP Address
HTTP_X_FORWARDED_FOR = random IP address. When multiple proxy servers are used, the value is as follows: 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. High Anonymity Proxies (Elite proxies)

REMOTE_ADDR = Proxy Server IP Address
HTTP_VIA = no value or no display
HTTP_X_FORWARDED_FOR = no value or no value is displayed. When multiple proxy servers are used, the value is similar to the following: 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.