devise-radius-authenticatable

https://github.com/cbascom/devise-radius-authenticatable

A new authentication strategy named radius_authenticatable is added to the list of warden strategies when the model requests it. The radius server information is configured through the devise initializer. When a user attempts to authenticate via radius, the radiustar gem is used to perform the authentication with the radius server. This authentication strategy can be used in place of the database_authenticatable or alongside it depending on the needs of the application.