Internet Authentication Service (IAS) is a network service by Microsoft that offers centralized authentication, authorization, and accounting for user access to network resources.
IAS implements the RADIUS protocol, enabling organizations to manage user accounts and permissions centrally, enhancing security by allowing only authorized users to access sensitive information.
IAS can take different forms, including RADIUS, TACACS+, and LDAP, catering to various organizational needs such as remote user authentication and detailed user permission controls.
The key features of IAS include authentication, authorization, and accounting, ensuring secure user access to resources and tracking user activity for compliance purposes.