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Broadcast information

By bobwelshjr ·
We had a recent situation in our internal network that led us to believe we had an intrusion. We have instituted much stricter firewall controls and are in the process of tightening down the hatches, and have something going on that is probably normal but we don't like. I downloaded and ran Angry IP Scanner 2.20 on our network, and noticed that every computer basically broadcasts its hostname, machinename and username information in some manner, because Angry IP Scanner found it all. What I want to know is, how can we block, hide or mask this information from being broadcast? IS there a way? I nosed around on Microsoft's site but you know, when you find white papers there detailing how we can use their data mining features in their OS to develop marketing strategies, I am not comfortable trying their way of network security.
Any help, guidance or assistance would sure help!

Bob Welsh

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by sgt_shultz In reply to Broadcast information

ok do not kill me because i am talking thru my hat here but don't you need that stuff for browsing. isn't this why they tell you not to run netbios? because broadcasts all this stuff? (cool that you can see it). if you uncheck 'run netbios over tcpip' does it take care of it. of course, kills browsing. have you run angry from outside lan and does this not demonstrate your router and firewall doing their job?

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by hitchcock4 In reply to Broadcast information

Comment to question and "Answer 1": If the network is completely based on Windows 2000, Windows XP, and Windows 2003, you do not need to run NetBios in any form. Turn it all off.

However, if you still have Win98 clients and Win NT, you should leave it on.

This also goes for WINS running on the servers: if it is all 2000 or newer, you can stop running WINS.

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