How does Antivirus scanning function in Palo Alto firewalls?

Antivirus scanning in Palo Alto firewalls operates by inspecting files and traffic for known malware signatures. This process involves evaluating the data packets traversing the network and utilizing a database of malware signatures that have been previously identified. When a file or data stream is scanned, the firewall checks it against this database to recognize any known threats.

This capability allows for real-time protection, as it acts upon detected malware by either alerting administrators or blocking the malicious content before it can enter a protected network. The focus on signatures means that the firewall can quickly and efficiently identify threats based on prior knowledge of malware characteristics, which is a critical function in network security to ensure that the environment remains safe from evolving threats.

The other options do not accurately describe how antivirus scanning functions. For instance, blocking all incoming traffic is not a method used for scanning; it could lead to disruption of legitimate traffic. Analyzing only inbound connections is too narrow a focus, as effective antivirus scanning needs to cover both inbound and outbound traffic to be truly comprehensive. Scanning only during off-peak hours is inefficient, as malware can operate at any time, and timely detection is paramount. Thus, the method of inspecting files and traffic for known malware signatures is crucial for maintaining robust network security