The system must be configured to limit how often keep-alive packets are sent.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4113	WN08-SO-000041	SV-48125r1_rule	ECSC-1	Low

Description
This setting controls how often TCP sends a keep-alive packet in attempting to verify that an idle connection is still intact. A higher value could allow an attacker to cause a denial of service with numerous connections.

STIG	Date
Windows 8 / 8.1 Security Technical Implementation Guide	2015-03-09

Details

Check Text ( None )
None

Fix Text (F-41262r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds" to "300000 or 5 minutes (recommended)" or less.