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ARP Cache Poisoning Attack

Helpful Neighbour
Hi, my antivirus keeps telling me that:

"A computer on the network is sending malicious traffic. This can be an attempt to attack your computer"

Based on the IP and MAC address of the source of this "attacks" I determined it's coming from a Telus wireless STB UIW4001e model. I assume this is just a false positive, since the IP address is in the safe range.

Is there something wrong with my network or is it normal for Telus wireless boxes to get flagged like this?

EDIT: After monitoring the UIW4001e network traffic with wireshark all it does is use the simple service discovery protocol with some Linux code. Now I'm sure it's a false positive from my antivirus.