What is the name for the process of using a router to process and scan packets for acceptable and unacceptable activity at the network level of the OSI?

The process of using a router to inspect and filter packets for acceptable and unacceptable activity at the network level of the OSI model is known as packet filtering. This technique involves analyzing the headers of packets to determine whether they should be allowed through or blocked based on predefined security rules. Packet filtering is commonly implemented in firewalls and helps to enhance network security by controlling traffic flow.