Norton Internet Security 2004 -Angriff von eigener IP?

[Sector]

NIS meldet dauern folgenden Angriff:
Ein Computer mit der folgenden IP-Adresse ...hat Informationen gesendet, die Merkmale eines Invalid UDP-Destination Port_Angriffs aufweisen.

Die IP-Adresse ist aber meine eigene!!!

Die Symantec-site meint dazu folgendes:

Invalid UDP Destination Port
Severity: Low

This attack poses a minor threat. Corrective action may not be possible or is not required.

Attack Category: Suspicious Activity

Anomalous network conditions or traffic patterns. A suspicious activity signature, for example, might detect two systems with identical IP addresses, a condition that indicates an attempted IP spoofing attack.

Description

This attack signature detects packets that have a UDP destination port of 0. 0 is an invalid value for the UDP destination port and must not be used.

Additional Information

Attackers sometime send UDP packets with a destination port of 0 as means of fingerprinting/profiling your operating system.

False Positive

None.

Frage: Was heißt/bedeutet das und wo liegt das Problem?