Which is one of the two ways to configure a firewall policy using SNAT?

Configuring a firewall policy using Source Network Address Translation (SNAT) can be done in several ways, and one of those methods involves the use of the outgoing interface address. When utilizing SNAT, the firewall can modify the source IP address of packets leaving the network to match the IP address of the outgoing interface. This is particularly useful in scenarios where internal clients need to send traffic to the outside world, allowing them to appear as a single external IP address.

Using the outgoing interface address ensures that the external responses can correctly return to the internal source, maintaining the session state. It simplifies the configuration and management of IPs, especially when dealing with dynamic IP addresses assigned by ISPs.

The other choices, while they may relate to network configuration or NAT processes, do not accurately represent a valid method for configuring firewall policies using SNAT. For instance, static IP allocation refers to assigned IPs rather than the dynamic handling of outgoing traffic, subnets allocation concerns broader IP address management, and address filtering focuses on controlling traffic based on specific criteria rather than the translation of the address.