An administrator can disable Agent/Master Access Control in the web UI by un-checking the box on the  Configure Global Security  page. Alternatively an administrator may create a file in JENKINS_HOME/secrets  named  slave-to-master-security-kill-switch  with the contents of  true  and restart Jenkins. Most Jenkins environments grow over time requiring their trust models to evolve as the environment grows. Please consider scheduling regular "check- ups" to review whether any disabled security settings should be re-enabled. CAUTION 156