Radius: Radius is in short is a protocol or piece of software that runs on server computers. It has many uses in the IT world but for the purposes of Internet Access services and ISP's, the job of radius is to decide which dialup customers are allowed to get on the Internet and which are not. For example if someone did not pay you for your Internet Service then you would not want them to access the Internet through your service. Radius software on a server would be the method used to keep a customer from using your services or the opposite, let them on the Internet. Radius is fairly complex and most people included most computer professionals have never even heard of Radius. This means that there are not too many people that really understand Radius very well. Lucky for you, Your Own ISP provides all Radius services free of charge included in all of our offerings. For a more detailed explination of Radius you might try searching for "Radius Software" in your favorite search engine.