Network users are experiencing intermittent issues with internet access. An engineer identified that the issue is being caused by NAT exhaustion. How must the engineer change the dynamic NAT…

Converting to dynamic manual NAT wouldn't inherently solve NAT exhaustion; it just changes the method of configuration and still relies on defined address pools or interface PAT.

An identity NAT rule performs a one-to-one mapping (no translation) for specific traffic, which would not help with providing internet access or alleviating NAT exhaustion.

When dynamic PAT (Port Address Translation) using a pool of addresses exhausts its available ports or addresses, configuring "fallthrough to interface PAT" on the Advanced tab of the NAT rule allows the Firepower device to use its egress interface's IP address and its available port range for subsequent connections. This provides additional capacity and prevents NAT exhaustion by expanding the pool of translation addresses/ports.

Defining an additional static NAT rule provides a fixed, one-to-one or one-to-many static mapping for specific internal hosts, which is not suitable for dynamically supporting a large number of general users and would not resolve dynamic PAT exhaustion.