Rule ID
SV-255600r961068_rule
Version
V1R2
CCIs
CCI-001133
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 up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, de-allocating associated TCP/IP address/port pairs at the operating system level, or de-allocating networking assignments at the application level if multiple application sessions are using a single, operating system-level network connection. This does not mean that the device terminates all sessions or network access; it only ends the inactive session and releases the resources associated with that session.
Review the device configuration. The following command shows the terminal settings: show terminal If the idle-timeout is greater than 10 minutes or is set to zero (no timeout), this is a finding. The following command shows the web management (GUI) settings: show web-service If the idle time is greater than 10 minutes or is set to zero (no timeout), this is a finding.
The following command sets the terminal idle timeout to 10 minutes: terminal idle-timeout 10 The following command sets the Web GUI timeout to 10 minutes: web-service timeout-policy idle 10 Note: 10 minutes is the default setting.