Finding ID | Version | Rule ID | IA Controls | Severity |
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V-76773 | IISW-SI-000200 | SV-91469r1_rule | Medium |
Description |
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Resource exhaustion can occur when an unlimited number of concurrent requests are allowed on a website, facilitating a Denial of Service attack. Mitigating this kind of attack will include limiting the number of concurrent HTTP/HTTPS requests per IP address and may include, where feasible, limiting parameter values associated with keepalive (i.e., a parameter used to limit the amount of time a connection may be inactive). |
STIG | Date |
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IIS 8.5 Site Security Technical Implementation Guide | 2018-09-18 |
Check Text ( C-76429r1_chk ) |
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Access the IIS 8.5 IIS Manager. Click the IIS 8.5 server. Select "Configuration Editor" under the "Management" section. From the "Section:" drop-down list at the top of the configuration editor, locate "system.applicationHost/sites". Expand "siteDefaults". Expand "limits". Review the results and verify the value is greater than zero for the "maxconnections" parameter. If the maxconnections parameter is set to zero, this is a finding. |
Fix Text (F-83469r1_fix) |
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Access the IIS 8.5 IIS Manager. Click the IIS 8.5 server. Select "Configuration Editor" under the "Management" section. From the "Section:" drop-down list at the top of the configuration editor, locate "system.applicationHost/sites". Expand "siteDefaults". Expand "limits". Set the "maxconnections" parameter to a value greater than zero. |