SEP port scan attack is logged - Spiceworks unable to scan devices

I am unable to scan about 15 computers in the network with Spiceworks.Symantec Endpoint Protection logs a port scan attack and blocks all traffic from the SpiceWorks server for 600 seconds when an inventory is attempted.

SEP clients are12.1.4013.4013 andmanaged from SEPM server version12.1.4023.7080. I had the same problem with the previous versions, I upgraded to see if that would help but there was no change.

I added a firewall rule within the group's policyto allow traffic. I beganwith opening onlythe ports needed, but have since opened the policy to include all traffic from the Spiceworks host for testing purposes).

From the client network log I noticed that the traffic is being blocked from a rule named "Block_All" however I do not see this rule within the firewall policy. There is a rule in the policy that blocks all traffic,...