What is radius?

Radius это прога со многими возможностями ты его можешь использовать например как фильтр

Radius это такая прога. RADIUS is an acronym for Remote Authentication Dial-In User Service. The MAX TNT uses RADIUS as a central location for storing: Authentication attributes Configuration data for establishing a WAN connection with an incoming call Routing information Dialout information Filters Accounting information RADIUS maintains authentication, incoming call configuration, dialout, routing, and filter information in individual user profiles. Each user profile consists of a series of attributes. The attributes indicate a user name and password. They also enable you to configure routing, call management, and restrictions on the types of MAX TNT resources a caller can access. Остальное читай в инете.