If an employee operates from a blocklisted IP address, what security measure is indicated?

When an employee operates from a blocklisted IP address, triggering step-up authentication is an important security measure. Step-up authentication is designed to provide an additional layer of security for situations that may indicate a heightened risk, such as an attempt to access corporate resources from a potentially unsafe or untrusted location.

By implementing step-up authentication in this scenario, the system can require more stringent verification methods, such as multi-factor authentication (MFA). This helps to ensure that the individual attempting to gain access is indeed who they claim to be, despite the risk associated with the IP address being used. This proactive measure helps protect sensitive data and systems from unauthorized access, especially when accessing resources over potentially insecure networks.

In contrast, other options do not address the immediate security risks posed by access attempts from blocklisted IP addresses. Simply not taking any action could leave the system vulnerable. Notifying only managers may not provide sufficient security as this does not prevent unauthorized access. Automatically revoking access might be too drastic in certain situations and could disrupt the employee's work unnecessarily without confirming the identity of the user. Therefore, step-up authentication is the most effective and responsive measure in this context.