Its called a NetBIOS Broadcast Storm, and its 15 years old now. No need to write your own code, many manufacturers, like Ungermann-Bass, IBM, Tandem Computers and others all wrote code that could do this quite effectively. The only difference between your code and theirs is that theirs would do it when you didn't want them to. Cheers, Russ - NTBugtraq Editor -----Original Message----- From: Francesco Vigo [mailto:f.vigo@anti-idle.com] Sent: Thursday, April 03, 2003 12:21 PM To: bugtraq@securityfocus.com Subject: NetBIOS could be used as network flood amplier Overview: Commonly used services, such as NetBIOS Name Server can be used to flood hosts with UDP data, sending spoofed name requests.