The macOS system must not have IP forwarding for IPv6 enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-81703	AOSX-13-001206	SV-96417r1_rule		Medium

Description
IP forwarding for IPv6 must not be enabled, as only authorized systems should be permitted to operate as routers.

STIG	Date
Apple OS X 10.13 Security Technical Implementation Guide	2020-05-29

Details

Check Text ( C-81483r1_chk )
To check if "IP forwarding" is enabled, run the following command: sysctl net.inet6.ip6.forwarding If the values are not "0", this is a finding.

Fix Text (F-88551r1_fix)
To configure the system to disable "IP forwarding", add the following line to "/etc/sysctl.conf", creating the file if necessary: net.inet6.ip6.forwarding=0