Hi Allison,
Thanks for posting here!
Generally speaking, UDP 139 is used for NetBIOS Session Service. Please
refer to the following information.
PORT 137 (UDP) for NetBIOS Name Service
PORT 138 (UDP) for NetBIOS datagram (Netlogon, Browsing)
PORT 139 (TCP) for NetBIOS session (NBT ¡¤ SMB ¡¤ File Sharing ¡¤ Printing
¡¤ Logon Sequence ¡¤ Windows NT 4.0 Trusts ¡¤ Windows NT 4.0 Directory
Replication ¡¤ Windows NT 4.0 Secure Channel ¡¤ Pass Through Validation ¡¤
Windows NT 4.0 Administration Tools (Server Manager, User Manager, Event
Viewer, Registry Editor, Diagnostics, Performance Monitor, DNS
Administration) )
In addition, I think the following article will be helpful.
Port Requirements for the Microsoft Windows Server System
http://support.microsoft.com/?id=832017
If you need further information and help on this question, please feel free
to let me know and I will be very happy to help.
Regards,
Bob Qin
Product Support Services
Microsoft Corporation
Get Secure! -
www.microsoft.com/security
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