1. The computer acting as a proxy server needs two network cards (for example, external network card192.168.168.9, internal network card192.168.0./kloc-) If the external network card is static public IP, please follow the ISP settings. If it is a public IP obtained dynamically, it is not necessary to set it. If it is a private IP, such as 192. 168. 1 68.9 (IP) 255.255.0 (mask)192.168.1(? Of course, if the proxy server itself provides DNS services, it can also be set to192.168.168.9 or192.168.0/). Settings of the internal network card, such as192.168.0.1(IP) 255.255.0 (mask), please do not set the default gateway of the internal network card, and DNS can be set or not. 3. There is no need to set the network card of the client (in the Internet cafe), such as192.168.0.2 (IP) 255.255.0 (mask). Client IE settings use a proxy server, such as192.168.0.1(IP) 8080 (http); 192.168.0.1(IP)1080 (socks 5) client (outside the Internet cafe, just like at home) settings. If the external network card IP of the proxy server is static public IP, such as 218.16.66.1,you only need to set your IE to use the proxy server, such as 218.16.66.1(. If the external network card IP of the proxy server is static internal network IP, it is necessary to do port mapping on the Internet cafe router, so I won't go into details.