Setting RADIUS Accounting
RADIUS accounting logs information about dial-in connections This information is often used for billing purposes. RADIUS accounting consists of a client/server format.
If you use RADIUS accounting, enter the IP address of two hosts each running a RADIUS accounting server on UDP port 1646. Designate one as your primary RADIUS accounting server and the other as the alternate (backup).
The PortMaster always sends accounting packets to the primary RADIUS accounting server first, and retries it once every 45 seconds. If the primary server does not respond within 10 minutes, or if more than 50 accounting packets are waiting to be sent, the PortMaster sends the accounting packets to the secondary RADIUS accounting server.