The vCenter Server must terminate vSphere Client sessions after 15 minutes of inactivity.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-258920	SRG-APP-000190	VCSA-80-000089	SV-258920r1015932_rule	2024-12-16	2

Description
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free resources committed by the managed network element. Satisfies: SRG-APP-000190, SRG-APP-000295, SRG-APP-000389

ℹ️ Check
From the vSphere Client, go to Administration >> Deployment >> Client Configuration. View the value of the "Session timeout" setting. If the "Session timeout" is not set to "15 minute(s)" or less, this is a finding.

✔️ Fix
From the vSphere Client, go to Administration >> Deployment >> Client Configuration. Click "Edit" and enter "15" minutes into the "Session timeout" setting. Click "Save".