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IP forwarding for IPv4 must not be enabled on AIX unless the system is a router.


Overview

Finding ID Version Rule ID IA Controls Severity
V-215263 AIX7-00-002064 SV-215263r508663_rule Medium
Description
IP forwarding permits the kernel to forward packets from one network interface to another. The ability to forward packets between two networks is only appropriate for systems acting as routers.
STIG Date
IBM AIX 7.x Security Technical Implementation Guide 2021-11-19

Details

Check Text ( C-16461r294240_chk )
From the command prompt, run the following command:

# no -o ipforwarding
ipforwarding = 0

If the value returned is not "0", this is a finding.
Fix Text (F-16459r294241_fix)
Disable IPv4 forwarding on the system by running command:
# no -p -o ipforwarding=0