As part of a routine security audit for a financial institution, you identify a need to improve the control over user access to the institution's networked assets. The goal is to ensure that each user is verified before access is granted and that all user activity is recorded and reviewed. In addition to this, certain users must only gain access to systems relevant to their role within the institution. Which component should be implemented to best achieve these objectives?
The correct answer is RADIUS server. RADIUS (Remote Authentication Dial-In User Service) is a client-server networking protocol that operates in the application layer which provides centralized Authentication, Authorization, and Accounting services for users. It is widely used to manage network access by verifying user credentials, enforcing security policies, and logging user activity, all in line with AAA principles. DHCP server, while important for automatically assigning IP addresses, does not participate in the authentication or accounting of user actions. Syslog server is intended for logging events from various systems, which aligns with the Accounting aspect, but it does not handle Authentication or Authorization. Web application firewall is designed to protect web applications from internet-based attacks and does not inherently provide AAA services.
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What does RADIUS stand for, and how does it work?
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What are AAA principles in network security?
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How does a RADIUS server differ from a Syslog server?