IPSec Exemptions will be limited.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-14232	3.127	SV-32375r1_rule		Low

Description
This check verifies that Windows is configured to limit IPSec exemptions.

STIG	Date
Windows Server 2008 R2 Member Server Security Technical Implementation Guide	2016-12-19

Details

Check Text ( C-32839r1_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: (NoDefaultExempt) Configure IPSec exemptions for various types of network traffic” is not set to “Only ISAKMP is exempt (recommended for Windows Server 2003)”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\IPSEC\ Value Name: NoDefaultExempt Value Type: REG_DWORD Value: 3

Check Text ( C-32839r1_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: (NoDefaultExempt) Configure IPSec exemptions for various types of network traffic” is not set to “Only ISAKMP is exempt (recommended for Windows Server 2003)”, then this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \System\CurrentControlSet\Services\IPSEC\

Value Name: NoDefaultExempt

Value Type: REG_DWORD
Value: 3

Fix Text (F-15854r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (NoDefaultExempt) Configure IPSec exemptions for various types of network traffic” to “Only ISAKMP is exempt (recommended for Windows Server 2003)”.