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The system 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-4397 GEN005560 SV-30079r1_rule ECSC-1 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
Solaris 10 X86 Security Technical Implementation Guide 2019-12-31

Details

Check Text ( C-8275r2_chk )
Check the system for an IPv4 default route.

Procedure:
# netstat -r |grep default

If a default route is not defined, this is a finding.
Fix Text (F-27159r1_fix)
Create or edit /etc/defaultrouter to contain the default gateway address.

Procedure (for a default gateway of 192.168.3.1):
# echo "192.168.3.1" > /etc/defaultrouter

Restart the system for the setting to take effect.