IP forwarding for IPv4 must not be enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-59745	AOSX-10-001205	SV-74175r1_rule		Medium

Description
IP forwarding for IPv4 must not be enabled, as only authorized systems should be permitted to operate as routers.

STIG	Date
Apple OS X 10.10 (Yosemite) Workstation Security Technical Implementation Guide	2017-04-06

Details

Check Text ( C-60515r1_chk )
To check if IP forwarding is enabled, run the following command: sysctl net.inet.ip.forwarding If the values are not '0', this is a finding.

Fix Text (F-65155r1_fix)
To configure the system to disable IP forwarding, add the following line to /etc/sysctl.conf: net.inet.ip.forwarding=0