This is the idle timeout, from 1 to 300 minutes, for a cookie-based RESTCONF session, reset each time there is activity on that session. This matters for both security and usability: too short a timeout forces automation clients to constantly re-authenticate, while too long a timeout leaves an idle authenticated session available longer, a small security exposure if the session cookie is intercepted. For example, an orchestration system that only polls RESTCONF every few minutes might need restconfRestSessionTimeout raised above the default of 5 minutes to avoid being logged out between polls.