AIX must be configured with a default gateway for IPv4 if the system uses IPv4, unless the system is a router.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215262 | AIX7-00-002063 | SV-215262r991589_rule | CCI-000366 | medium |
| Description | ||||
| If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of Service attacks. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215262r991589_chk)
Check the system for an IPv4 default route using command:
# netstat -r |grep default
default 10.11.20.1 UG 1 1811 en0 - -
If a default route is not defined, this is a finding.
Fix Text (F-16458r294238_fix)
Set a default gateway for IPv4 using:
# route add 0 <ip address of gateway>