IPSec Exemptions will be limited.

From Windows Server 2008 R2 Member Server Security Technical Implementation Guide

Associated with: CCI-000366

SV-32375r1_rule IPSec Exemptions will be limited.

Vulnerability discussion

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

Check content

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

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)”.

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