TCP Port 32961

Hello everybody,

I get periodically the following warning from my antivirus on different computers on my network:

Component: Network Attack Blocker
Result description: Blocked
Name: Scan.Generic.PortScan.TCP
Object: TCP from 192.168.50.1 at 192.168.50.101:32961

Is that my Purple Firewalla(192.168.50.1) scanning for something or is it really an external scan?

Thank you in advance for any insights.