GEN008520 - The system must employ a local firewall.

Information

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.

Solution

Enable the system's local firewall.
# chkconfig iptables on
# service iptables start

See Also

http://iasecontent.disa.mil/stigs/zip/U_RedHat_5_V1R18_STIG.zip