Port 3128 is used for proxy servers. It is commonly used for HTTP traffic and allows clients to connect to the internet through the proxy server. The proxy server acts as an intermediary between the client and web server, making requests on behalf of the client and returning the response to the client. It is often used in corporate environments to control internet access and provide caching of frequently accessed web content.
Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.
Official
Port |
Protocol (TCP/UDP) |
Title |
Description |
Port Type |
Port 3128 |
tcp |
ndl-aas |
Active API Server |
REGISTERED PORT |
Port 3128 |
udp |
ndl-aas |
Active API Server |
REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
| Port | Protocol (TCP/UDP) | Description |
| Port 3128 | HTTP used by Tatsoft as the default client connection | |
| Port 3128 | HTTP used by Web caches and the default for the Squid (software) |