0x0–0xFFFFFFFF ( events )
Specifies the maximum number of illegal-datagram events that can be counted within the interval defined by the value of the IllegalDatagramResetTime entry. Events that are counted are then recorded in the System Log in Event Viewer.
IllegalDatagramResetTime and NumIllegalDatagramEvents are designed to prevent the System Log from becoming filled with illegal-datagram events.
Windows 2000 does not add this entry to the registry. You can add it by editing the registry or by using a program that edits it.