The F5 BIG-IP appliance must be configured to filter inbound traffic on all external interfaces.

Unrestricted traffic to the trusted networks may contain malicious traffic that poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth and other resources.

Firewall filters control the flow of network traffic, ensure the flow of traffic is only allowed from authorized sources to authorized destinations. Networks with different levels of trust (e.g., the internet) must be kept separated.

From the BIG-IP GUI: 1. Security. 2. Network Firewall. 3. Policies. 4. <Policy Name>

If configured rules in the policy do not filter inbound traffic on all active external interfaces, this is a finding.

From the BIG-IP GUI: 1. Security. 2. Network Firewall. 3. Policies. 4. <Policy Name> 5. Configure rules to using packet headers and packet attributes, including source and destination IP addresses and ports to filter inbound traffic on all external interfaces.