How to Disable NetBIOS on the SQL Server Box

Today I’ll post a quick one, since a simple Google search (yeah, Bing, sorry) did not yield too many useful results.

Just as a quick note, make sure you have a chat with your sys admins; they can tell you whether the protocols are needed or not anymore.

Okay, on with the tip:

  • Go to Device Manager (either right-click My Computer and select Manage from the contextual menu, or go to Administrative Tools > Computer Management. The Server Management dialog box is displayed, as shown below

  • Expand Diagnostics, and then select Device Manager. You will get to see a screen similar with the one shown below:

  • Go to View menu and select Show Hidden Devices – we’re not getting closer to what we need. Expand the Non-Plug and Play Drivers node (that was not there previously).
    Right-click NETBT (if I remember correctly, it’s called NetBIOS over TCP/IP in Windows 2003) and select Uninstall.

  • Pray that you’ll not get a call in the next few days saying: “what did you do, my app stopped working!”

Okay, now what you’re actually finding by searching Google and Bing:

  • Open Network and Sharing Center and click the Change Adapter Settings. You should see something similar with the dialog box below:

  • Right-click the net adapter (in my case there’s only one, but you need to change the one that is subject to have its properties changed) and select Properties from the contextual menu.

  • Ah, almost forgot, if you need to disable the SMB as well, select File and Printer Sharing for Microsoft Networks and select Uninstall. Moving further, select Internet Protocol Version 4 and select Properties.

  • Click Advanced and then click the WINS tab.

  • Click the Disable NetBIOS over TCP/IP radio button.

Now you know how to completely disable NetBIOS, or to “suspend” it from the Advanced TCP/IP settings. I would go for the latter, since most likely somebody will call either you or the sys admins telling that there is an app that needs that particular “protocol“.

I hope this helps.

Best regards,

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