Finding ID | Version | Rule ID | IA Controls | Severity |
---|---|---|---|---|
V-4117 | 3.102 | SV-29611r1_rule | ECSC-1 | Low |
Description |
---|
Adjusts retransmission of TCP SYN-ACKs. When enabled, connection responses time out more quickly in the event of a SYN DoS attack. |
STIG | Date |
---|---|
Windows 2003 Domain Controller Security Technical Implementation Guide | 2012-09-05 |
Check Text ( C-314r1_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: (SynAttackProtect) Syn attack protection level (protects against DoS)” is not set to “Connections time out sooner if a SYN attack is detected”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: SynAttackProtect Value Type: REG_DWORD Value: 1 |
Fix Text (F-5725r1_fix) |
---|
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (SynAttackProtect) Syn attack protection level (protects against DoS)” to “Connections time out sooner if a SYN attack is detected”. |