Port 3128 tcp/udp information, assignments, application use and known security risks., Port Enter the port number to connect to the proxy server (usually 1080, 80, 8080, 3128, etc.). Protocol Choose the protocol used by the proxy server. Proxifier supports four protocols: SOCKS version 4 (A): a legacy proxy server protocol that does not support authentication. You can specify only User ID., The string “+”:8080″ +”:3128″ +”:3128″ +”:80″” is a search query used to find proxy servers. Proxy servers act as intermediaries between your device and the internet. They can hide your IP address, bypass restrictions, and improve security. These numbers represent common ports used by proxy servers., What is Squid Proxy Port (3128)? The Squid proxy port, typically designated as port 3128, is commonly employed for caching or forwarding proxies. While this port number is the default for caching proxies, it is also utilized in conjunction with other ports for various proxy types, including ports 80, 8080, and 443 among others., I am currently in touch with a few HTTP proxy installations. As every time when troubleshooting network issues, I am looking at Wireshark on the network and trying to understand the different packets. Here is a short overview of the differences between HTTP requests that are sent directly to the destination and HTTP requests that are sent via a proxy. Wireshark screenshots and a downloadable , .