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The operating system must prevent public IPv4 access into an organizations internal networks, except as appropriately mediated by managed interfaces employing boundary protection devices.


Finding ID Version Rule ID IA Controls Severity
V-217932 RHEL-06-000117 SV-217932r505923_rule Medium
The "iptables" service provides the system's host-based firewalling capability for IPv4 and ICMP.
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2020-09-03


Check Text ( C-19413r376811_chk )
If the system is a cross-domain system, this is not applicable.

Run the following command to determine the current status of the "iptables" service:

# service iptables status

If the service is not running, it should return the following:

iptables: Firewall is not running.

If the service is not running, this is a finding.
Fix Text (F-19411r376812_fix)
The "iptables" service can be enabled with the following commands:

# chkconfig iptables on
# service iptables start