Finding ID | Version | Rule ID | IA Controls | Severity |
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V-3450 | 5.039 | SV-3450r1_rule | ECSC-1 | Medium |
Description |
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This setting limits the number of simultaneous connections allowed to the terminal server. By default, unlimited connections are allowed. Allowing unlimited connections allows a potential DoS attack. The number of incoming connections should be limited to one. |
STIG | Date |
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Windows 2003 Domain Controller Security Technical Implementation Guide | 2012-07-02 |
Check Text ( C-1801r1_chk ) |
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If the following registry value doesn’t exist or its value is not set to 1, then this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: MaxInstanceCount Type: REG_DWORD Value: 1 Documentable Explanation: If the system has the role as a Terminal Server, or the site is using terminal services for remote administration this requirement needs to be documented with the IAO. |
Fix Text (F-5919r1_fix) |
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Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services “Limit Number of Connections” to “Enabled”, and the value “TS maximum connections allowed” to no more than “1”. |