Finding ID | Version | Rule ID | IA Controls | Severity |
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V-4437 | 5.097 | SV-29612r1_rule | ECSC-1 | Low |
Description |
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In a SYN flood attack, the attacker sends a continuous stream of SYN packets to a server, and the server leaves the half-open connections open until it is overwhelmed and no longer is able to respond to legitimate requests. |
STIG | Date |
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Windows 2003 Domain Controller Security Technical Implementation Guide | 2014-04-07 |
Check Text ( None ) |
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None |
Fix Text (F-6084r1_fix) |
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Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (TcpMaxConnectResponseRetransmissions) SYN-ACK retransmissions when a connection is not acknowledged” to “3 & 6 seconds, half-open connections dropped after 21 seconds”, “3 seconds, half-open connections dropped after 9 seconds” or “No retransmission, half-open connections dropped after 3 seconds”. |