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UDP/DOmain Controller question

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6 replies

by legj1

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Atleast once a day my DC is sending 6 64 byte UPD packets (polling?) to every IP address (used and not used IP's) on the network. Anyone have any idea why this is happening? Generating a lot of traffic. Any ideas appreciated. Thank you!

6 replies

by ann777

Do you have extra protocols installed that you are not using? Extra services? Make sure NetBEUI is not enabled.

by acattr

What you are seeing is netbios broadcast packets. The DC is using it to update the Master Browser list. 2000 and XP machines use DNS for browsing, so if your not using 9x, ME, or NT you can disable this. In your TCP/IP properties, wins tab, check"disable NetBios over TCP/IP."

Also, Assuming you have 1000 computers on the network. 6 broadcast X 64 bytes X 1000 computers = 384,000 bytes = 384Kbytes = 0.386 Megabytes. I wouldn't call that alot of traffic.

by acattr

Mind answer 1 refers to the protocol NetBEUI which also causes browgin, I am talking about NetBios which is used by 2000 to communicate with legacy operating systems using SMB.

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