# Configuring RADIUS Relay Server

This chapter describes the E Series router’s RADIUS relay server feature. The RADIUS relay server provides authentication, authorization, accounting, and addressing services to wireless subscribers in public areas, such as airports and coffee shops. This chapter has the following sections:

- RADIUS Relay Server Overview
- RADIUS Relay Server Platform Considerations
- RADIUS Relay Server References
- How RADIUS Relay Server Works
- RADIUS Relay Server and the SRC Software
- Configuring RADIUS Relay Server Support
- Monitoring RADIUS Relay Server