The systems local firewall must implement a deny-all, allow-by-exception policy.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22583	GEN008540	SV-46060r1_rule		Medium

Description
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.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43325r1_chk )
Check the firewall rules for a default deny rule. # iptables --list If there is no default deny rule, this is a finding.

Fix Text (F-39416r1_fix)
Edit “ /etc/sysconfig/scripts/SuSEfirewall2-custom” and add a default deny rule. Restart the SuSEfirewall2 service # rcSuSEfirewall2 restart