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The system is configured for a greater keep-alive time than recommended.


Overview

Finding ID Version Rule ID IA Controls Severity
V-4113 3.097 SV-29610r1_rule Low
Description
Controls how often TCP sends a keep-alive packet in attempting to verify that an idle connection is still intact.
STIG Date
Windows 2008 Member Server Security Technical Implementation Guide 2019-06-18

Details

Check Text ( C-299r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view.

Navigate to Local Policies -> Security Options.

If the value for “MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds” is not set to “300000 or 5 minutes (recommended)” or less, then this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Subkey: \System\CurrentControlSet\Services\Tcpip\Parameters\

Value Name: KeepAliveTime

Value Type: REG_DWORD
Value: 300000
Fix Text (F-28004r1_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.