Norton Notification: Vulnerability BLOCKED

I occasionally get the following Norton Notification:

Vulnerability BLOCKED
When: (date and time)
From: (IP address of another computer on my network
Attack Name: Portscan
Application: /mach_kernel

Is this anything serious, or is it just normal network activity?

If it matters, the notification shows up on my MacBook. The IP address in the notification is a PC.

Thanks in advance for your help.

bob42376Asked:
Who is Participating?
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.