Finding ID | Version | Rule ID | IA Controls | Severity |
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V-21956 | 3.156 | SV-25279r1_rule | ECSC-1 | Low |
Description |
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This check verifies Windows is configured to control the maximum number of times that IPv6 TCP retransmits unacknowledged data segments before aborting the attempt to prevent resources from becoming exhausted. |
STIG | Date |
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Windows 7 Security Technical Implementation Guide | 2012-07-02 |
Check Text ( C-26842r1_chk ) |
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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: (TcpMaxDataRetransmissions IPv6) How many times unacknowledged data is retransmitted (3 recommended, 5 is the default)” is not set to “3” or less, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \System\CurrentControlSet\Services\Tcpip6\Parameters\ Value Name: TcpMaxDataRetransmissions Type: REG_DWORD Value: 3 (or less) |
Fix Text (F-22945r1_fix) |
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Configure the policy value for “MSS: (TcpMaxDataRetransmissions IPv6) How many times unacknowledged data is retransmitted (3 recommended, 5 is the default)” to “3” or less. |