GEN005600 - IP forwarding for IPv4 must not be enabled, unless the system is a router.

Information

If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices.

Solution

Disable IPv4 forwarding on the system.
#no -p -o ipforwarding=0

See Also

http://iasecontent.disa.mil/stigs/zip/U_STIG_Library_2015_07.zip