The number of allowed simultaneous requests must be set.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-2240	WG110	WG110 A22	SV-33018r1_rule	2019-01-07	1

Description
Resource exhaustion can occur when an unlimited number of concurrent requests are allowed on a web site, 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).

Description

Resource exhaustion can occur when an unlimited number of concurrent requests are allowed on a web site, 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).

ℹ️ Check
To view the MaxKeepAliveRequests value, enter the following command: grep "MaxKeepAliveRequests" /usr/local/apache2/conf/httpd.conf If the returned value of MaxKeepAliveRequests is not set to 100 or greater, this is a finding.

✔️ Fix
Edit the httpd.conf file and set the MaxKeepAliveRequests directive to 100 or greater.