Title

IP forwarding for IPv4 must not be enabled on AIX unless the system is a router. (Cat II impact)

Discussion

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.

Check Content

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

Disable IPv4 forwarding on the system by running command: # no -p -o ipforwarding=0

Additional Identifiers

Rule ID: SV-215263r991589_rule

Vulnerability ID: V-215263

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.