Disable NetBIOS over TCP/IP in Windows 7 ent.

NetBIOS over TCP/IP (NBT, or sometimes NetBT) is a networking protocol that allows legacy computer applications relying on the NetBIOS API to be used on modern TCP/IP networks.

NetBIOS was developed in the early 1980s, targeting very small networks (about a dozen computers). Some applications still use NetBIOS, and do not scale well in today’s networks of hundreds of computers when NetBIOS is run over NBF. When properly configured, NBT allows those applications to be run on large TCP/IP networks (including the whole Internet, although that is likely to be subject to security problems) without change.

NetBIOS provides three distinct services:

  • Name service for name registration and resolution (port: 137)
  • Datagram distribution service for connectionless communication (port: 138)
  • Session service for connection-oriented communication (port: 139)

If you want disable NetBIOS over TCP/IP you take the following steps:

1. Right click to your network interface at the right down corner:

2. Choose “Open Network And Sharing Center”

3. Next click to “Change Adapter Settings”

4. Right click on your network adapter and choose “Properties”

5.  On your network adapter click to “Internet Protocol Version 4” and Properties.

6. When you open the “Properties” you hit on button “Advanced”

7. When you click to Advanced button, Windows will open “Advanced TCP/IP Settings”

In that last window you click on “WINS” tab and then choose “Disable NetBIOS over TCP/IP”

And NetBIOS over TCP/IP is Disabled.