The system's local firewall must implement a deny-all, allow-by-exception policy.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001109

SV-38985r1_rule The system's local firewall must implement a deny-all, allow-by-exception policy.

Vulnerability discussion

A local firewall protects the system from exposing unnecessary or undocumented network services to the local enclave. If a system within the enclave is compromised, firewall protection on an individual system continues to protect it from attack.

Check content

Determine if the system's local firewall implements a deny-all, allow-by-exception policy. View the firewall (filter rules) with smit or lsfilt commands. # smitty ipsec4 # lsfilt If there is not a deny-all, allow-by-exception policy, this is a finding.

Fix text

Configure the system's local firewall to implement a deny-all, allow-by-exception policy. Firewall rules can be added and activated with SMIT ipsec4 or genfilt command. #smitty ipsec4

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