Setting RADIUS Authentication
If you use RADIUS, enter the IP address of the two hosts each running a RADIUS authentication server on UDP port 1645. Designate one as your primary RADIUS authentication server and the other as the alternate (backup).
The PortMaster always queries the primary RADIUS server first. If the server does not respond, it is queried a second time. Then both the primary and secondary servers are queried up to eight times at 3-second intervals until one responds or until 3 seconds after the tenth query without a response.
RADIUS authenticates users for dial-in remote access. Authentication information is stored in a local users file or accessed from external authentication mechanisms such as a UNIX password file or Secure ID ACE/Server database.