EX19-ED-000234 Exchange must provide redundancy.

Information

Denial of Service (DoS) is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity.

This requirement addresses the configuration of applications to mitigate the impact of DoS attacks that have occurred or are ongoing on application availability. For each application, known and potential DoS attacks must be identified and solutions for each type implemented. A variety of technologies exist to limit or, in some cases, eliminate the effects of DoS attacks (e.g., limiting processes or restricting the number of sessions the application opens at one time). Employing increased capacity and bandwidth, combined with service redundancy, may reduce the susceptibility to some DoS attacks.

Solution

Update the EDSP to reflect the Exchange servers used for redundancy.

Configure and subscribe to two or more Edge servers for load balancing.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Exchange_2019_Y24M07_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-8, CAT|I, CCI|CCI-002418, Rule-ID|SV-259640r961632_rule, STIG-ID|EX19-ED-000234, Vuln-ID|V-259640

Plugin: Windows

Control ID: 3f7441a159f021ddfb85ca5a0c41332e0ef369ec0c868debb32afe32c61fd8dc