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| Disable NetBIOS on a local computer (Server) |
| NetBIOS is an application programming interface (API) created by IBM for its early PC LAN |
| network. Since its creation, NetBIOS has become the industry standard and is used in Ethernet, |
| token ring, and other networks. While it's still widely used, to maintain a highly secure |
| environment, you'll want to disable it and use TCP/IP instead. |
| Execute this process on each machine to disable the NetBIOS interface and naming convention |
| Open the Network And Dial-up Connections folder from Control Panel. |
| Right-click the network connection for which you want to disable NetBIOS and click Properties. |
| Click Internet Protocol (TCP/IP) and click Properties. |
| Click Advanced and go to the WINS tab. |
| Click Disable NetBIOS Over TCP/IP. |
| Click OK and close all dialog boxes. |
| Once you've done this, your computer(s) will stop listening on the UDP port 138, the NetBIOS |
| name service at UDP port 137, and the NetBIOS session service on TCP port 139. |
| Note: Be careful when disabling NetBIOS over TCP/IP since programs and services that depend on |
| NetBIOS won't function any longer. |
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