Server security has always been a top priority, especially since the viruses and Trojans in the Windows system have been incessantly killed. In addition to installing anti-virus software and configuring the firewall, you can also enable TCP/IP filtering to perform some port filtering. 1. On the desktop, find the “Network Neighborhood” icon, right click on the icon and select “Attributes” to open the network connection window. (Figure 1 Network Neighborhood Right-Click Properties) 2. In the Open Network Connection window, find the local connection and right-click to select “Attributes”, as shown in Figure 2. (Figure 2 local connection properties open method) Some users server may be the same as shown in Figure 2, is a multi-line server, so there may be multiple local connections here, here only need to find the IP address in the local connection and its own server IP is Then proceed to the second step. 3. Locate and double-click "Internet Protocol (TCP/IP)" in the "Local Connection Properties" window that opens. (Figure 3 Open TCIP/Property Settings) 4. In the “Internet Protocol (TCP/IP) Properties” window that opens, locate and click the “Advanced” button. (Figure 4 TCP/IP Advanced Settings) 5. In the Open “Advanced TCP/IP Settings” found and click to switch to the "Options" tab, find and click in this tab “ Attributes & rdquo; button. The operation method is as shown in Figure 5 below. (Figure 5 Advanced TCP/IP Filtering Property Settings) 6. In the "TCP/IP Filtering" window that opens, 1) "Enable TCP/IP Filtering (All Adapters)". 2) Click to select “only allow ” in the left window. 3) Click the “Add” button again in the left side. 4) A new window will appear, enter your allowed port number in the TCP port window, such as port 80 and then confirm. 5) Go back to the TCP/IP filter to determine again. (Figure 6 TCP /IP filter filter port settings) 7, and then back to determine. After you have made your decision, you must restart your computer. This restart computer is also very particular, it is best to hard restart. Mutual help network description: The so-called hard boot, simply speaking, is a direct restart of the host computer operation. If the server is someone else's host or rented host, there should generally be a similar hard-boot setting. However, the soft restart seems to be OK, but I have not tried it. I am hard-starting.