Ensure ipforwarding is disabled

MediumLevel 1Automatedaix

Description

The ipforwarding parameter determines whether or not the system forwards TCP/IP packets. The ipforwarding parameter will be set to 0, to ensure that redirected packets do not reach remote networks. This should only be enabled if the system is performing the function of an IP router. This is typically handled by a dedicated network device. Audit: `no -o ipforwarding` must report 0.

How it is checked

Audit method: Shell command

shell

command -v no >/dev/null 2>&1 || exit 1; out=$(no -o ipforwarding 2>/dev/null) || exit 1; printf '%s\n' "$out" | sed 's/[[:blank:]]*=[[:blank:]]*/=/'

Expected output: ipforwarding=0

How it is fixed

Fix method: Guidance or infrastructure patch

no -p -o ipforwarding=0 (sets the running value and makes it persistent in /etc/tunables/nextboot)

Properties

Operating systems: Any
Tags: aixnetwork
Reference: CIS IBM AIX 7 Benchmark v1.2.0 - 4.5.6 Ensure ipforwarding is disabled

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target aix