One IP builds multiple websites-TCP port site Windows 2000 Server will generally start a default website to provide Internet services for the whole network after successful installation. In small and medium-sized LAN, there is often only one server, but a website obviously can't meet the needs of work. So, can you build multiple websites on one server? The answer is yes, there are many ways to achieve this goal. As we know, every website on the network has a unique identity so that customers can access it accurately. This logo consists of three parts, namely TCP port number, IP address and host name. To realize "one machine with multiple stations", we need to work hard in these three aspects. This paper will introduce the method of "TCP port number" in the form of examples. We know that the default port of a website is generally 80. If we change this port, we can achieve the purpose of adding a site on the same server.