Does TOS routing apply to packets as they exit from the firewall?

The statement regarding TOS (Type of Service) routing as it applies to packets exiting from the firewall is false. TOS is primarily utilized for classifying and prioritizing network traffic based on the service requirement (like delay, throughput, reliability, etc.) at the time of packet forwarding. While TOS can be set on packets entering a network or when they are processed internally, its application as packets exit is not relevant in the same context, particularly within a firewall's functioning.

Firewalls generally have different mechanisms in place for determining how traffic is managed upon exit, primarily focusing on security rules rather than just traffic behavior or service performance indicators represented by TOS. Other parameters and rules take precedence when determining how packets are treated as they leave the firewall, thus highlighting that TOS routing does not distinctly apply to outbound packets in the same way it can apply during ingress.

The relevance of TOS and other routing strategies is usually more pertinent to the direction of traffic entering the firewall, where packets can be assessed and prioritized based on their intended service upon arrival.