Rule ID
SV-221519r961620_rule
Version
V2R3
CCIs
A Denial of Service (DoS) can occur when the web server is so overwhelmed that it can no longer respond to additional requests. A web server not properly tuned may become overwhelmed and cause a DoS condition even with expected traffic from users. To avoid a DoS, the web server must be tuned to handle the expected traffic for the hosted applications.
1. Check to see if the following directives have been set appropriately for the server and application: MaxClients MPM Module -worker (StartServers, MinSpareThreads, MaxSpareThreads, ThreadsPerChild) Timeout KeepAlive KeepAliveTimeout MaxKeepAliveRequests ListenBacklog LimitRequestBody LimitRequestFields LimitRequestFieldSize LimitRequestLine LimitXMLRequestBody LimitInternalRecursion 2. If the above directives have not been set to address the specific needs of the web server and applications, this is a finding.
Set the following directives appropriately for the server and application: MaxClients MPM Module -worker (StartServers, MinSpareThreads, MaxSpareThreads, ThreadsPerChild) Timeout KeepAlive KeepAliveTimeout MaxKeepAliveRequests ListenBacklog LimitRequestBody LimitRequestFields LimitRequestFieldSize LimitRequestLine LimitXMLRequestBody LimitInternalRecursion