Generally speaking, the network problem that BT can't use is because the administrator of the intranet restricts P2P software such as BT. (Even for users who use direct broadband access, the ISP providing access services can be regarded as a network manager. ) If solving BT failure is regarded as a war, then our enemy is network management, and to win this war, we must know ourselves and ourselves! Methods for network management to restrict BT: 1. Anti-BT protocol ports block BT ports used by computers in the network through IP policies or professional firewall software. Such as 688 1. . (For this problem, there are solutions on the network, such as opening the system's resource manager, selecting tools, folder options and file types in the menu, finding the extended Torrent in the window, and clicking the advanced button. Click the "Edit" button in the opened window, and then modify the command line parameters for starting BT program in the editing window: add a space at the end of the line, and the parameters "-—minport" (representing the lowest port number) and "-—maxport" (the highest port number) bound to the control port. For example, d:/programfiles/bitcomet/bitcomet. Exe ""%1"-minport7201-maxport7304", please set the port number at will instead of the original range of 688 1-6889, and finally reset it. (2) Limit the number of TCP/UDP sessions downloaded by BT. Set the server system to limit the maximum number of connections from external computers to this network. Third, limit the upstream and downstream bandwidth (current limiting) of BT download. For the second and third, if you want to solve the problem, unless you have access to the host of your network, you can bribe the network administrator or invade the host. Local errors: First, the local firewall software restricted the operation of BT; Second, intranet computers cannot receive connections from external computers. If UpnP automatic port mapping is not adopted or NAT is not set manually for port mapping (please refer to [URL]). Net/download/XP _ SP2 _ tcpip _ patch.exe [/URL] IV There are too many network layers for a detailed explanation of this problem. Just like we are now, the dormitory is connected to the PPPOP server of the school with a router, and the school is connected to the Internet connection service of China Telecom, which is equivalent to a three-layer network. This makes it difficult to obtain BT resources from external computers. I haven't found a solution to this situation.