Explanation
SSL Forward Proxy is a feature that allows the firewall to decrypt and inspect outbound SSL traffic from internal users to external servers1. The firewall acts as a proxy (MITM) generating a new certificate for the accessed URL and presenting it to the client during SSL handshake SSL Forward Proxy can be configured on any interface type that supports security policies, which are Layer 2, Virtual Wire, and Layer 3 interfaces1. These interface types allow the firewall to apply security profiles and URL filtering on the decrypted SSL traffic.

https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-admin/user-id/deploy-user-id-in-a-large- scale-network/share-user-id-mappings-across-vsys

Explanation/Reference:
Reference: https://www.paloaltonetworks.com/documentation/80/pan-os/web-interface-help/device/device- high-availability/ha-lite

Decryption can be resource-intensive, and in scenarios where the firewall is nearing its resource limits, optimizing decryption practices is crucial. One way to do this is by choosing more efficient encryption algorithms that require less computational power.
C: Use ECDSA instead of RSA for traffic that isn't sensitive or high-priority:
* Elliptic Curve Digital Signature Algorithm (ECDSA) is known for requiring smaller key sizes compared to RSA for a comparable level of security. This translates to less computational overhead during the encryption and decryption processes.
* By using ECDSA for traffic that isn't sensitive or high-priority, the administrator can reduce the processing load associated with decryption on the firewall. This is particularly beneficial in scenarios where resource optimization is necessary.
* It's important to note that this approach does not compromise the security of encrypted traffic. Instead, it offers a more resource-efficient way to manage decryption, thus helping to maintain firewall performance even when system resources are under significant demand.
By judiciously applying this strategy, administrators can manage the decryption workload on the firewall, ensuring continued protection and inspection of encrypted traffic without overburdening the firewall's resources.