Finding ID | Version | Rule ID | IA Controls | Severity |
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V-4113 | WN12-SO-000041 | SV-52927r1_rule | Low |
Description |
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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 |
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Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide | 2017-06-09 |
Check Text ( C-47232r2_chk ) |
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If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: KeepAliveTime Value Type: REG_DWORD Value: 300000 (or less) |
Fix Text (F-45853r2_fix) |
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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. (See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.) |