What can a RADIUS Proxy server do? Block DNS requests Forward authentication and accounting messages Filter IP addresses Encrypt all network traffic

A RADIUS (Remote Authentication Dial-In User Service) Proxy server primarily functions to forward authentication and accounting messages between RADIUS clients and RADIUS servers. Here’s a breakdown of the options provided: 1. **Block DNS requests**: This is not a function of a RADIUS Proxy server. RADIUS deals with authentication, authorization, and accounting, rather than DNS. 2. **Forward authentication and accounting messages**: This is the primary function of a RADIUS Proxy server. It acts as an intermediary that can route RADIUS requests from clients to the appropriate RADIUS server based on various criteria (like the user’s attributes or the source of the request). 3. **Filter IP addresses**: This is not a specific function of RADIUS Proxy; while it may be able to control access to RADIUS requests based on IP addressing (e.g., allowing or denying access to certain clients), this is not a core feature of RADIUS Proxy. 4. **Encrypt all network traffic**: RADIUS does not encrypt the entire packet data, and while RADIUS Proxies can be involved in secure environments, the encryption of the entire traffic typically relies on protocols like IPsec or TLS, not on the RADIUS Proxy itself. In summary, the correct answer is: **Forward authentication and accounting messages**.