Today’s complex networking environment often requires coordinating a high-volume, high-capacity load balancing configuration with robust authentication and authorization. Users may connect to a VPN through mobile access points such as consumer-grade DSL or Cable connections, WiFi, or even dial-up nodes. Those connections usually use dynamic IPs, which can change during the connection. If you configure RADIUS load balancing on the Barracuda Load Balancer ADC appliance to support persistent client connections to RADIUS authentication servers, the appliance uses the user logon or the specified RADIUS attribute instead of the client IP as the session ID. This directs all connections and records associated with that user session to the same RADIUS server. Users are therefore able to log on to your VPN from mobile access locations without experiencing disconnections when the client IP or WiFi access point changes.
What is AAA: Authentication, authorization, and accounting (AAA) is a framework for controlling access and auditing usage. The RADIUS Server Load Balancing feature distributes AAA authentication and accounting transactions across RADIUS servers in a server group. These servers can share the AAA transaction load and thereby respond faster to incoming requests.