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V-256797

CAT II (Medium)

vSphere UI must limit the number of allowed connections.

Rule ID

SV-256797r889390_rule

STIG

VMware vSphere 7.0 vCenter Appliance UI Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-001094

Discussion

Limiting the number of established connections is a basic denial-of-service protection and a best practice. Servers where the limit is too high or unlimited can run out of system resources and negatively affect system availability.

Check Content

At the command prompt, run the following command: 
 
# xmllint --xpath '/Server/Service/Connector[@port="${http.port}"]/@acceptCount' /usr/lib/vmware-vsphere-ui/server/conf/server.xml 
 
Expected result: 
 
acceptCount="300" 
 
If the output does not match the expected result, this is a finding.

Fix Text

Navigate to and open: 
 
/usr/lib/vmware-vsphere-ui/server/conf/server.xml 
 
Navigate to the <Connector> configured with port="${http.port}". 
 
Add or change the following value: 
 
acceptCount="300" 
 
Restart the service with the following command: 
 
# vmon-cli --restart vsphere-ui