IPSec exemptions are limited.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-14232	3.127	SV-25069r1_rule		Low

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

STIG	Date
Windows 7 Security Technical Implementation Guide	2016-12-19

Details

Check Text ( C-11577r1_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 “Multicast, broadcast and ISAKMP exempt (best for Windows XP)”, 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: 1

Check Text ( C-11577r1_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 “Multicast, broadcast and ISAKMP exempt (best for Windows XP)”, 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: 1

Fix Text (F-13556r1_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 “Multicast, broadcast and ISAKMP exempt (best for Windows XP)”.