The system must be configured with a default gateway for IPv4 if the system uses IPv4, unless the system is a router.

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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 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE	2017-06-21

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.