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V-22583

CAT II (Medium)

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

Rule ID

SV-46060r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-001109

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

Check the firewall rules for a default deny rule.
# iptables --list
If there is no default deny rule, this is a finding.

Fix Text

Edit “ /etc/sysconfig/scripts/SuSEfirewall2-custom” and add a default deny rule.

Restart the SuSEfirewall2 service
# rcSuSEfirewall2 restart