This is a (very) basic active RADIUS check:

• tests if a RADIUS server is responsive (accept/reject/timeout).
• (limited) support to add AV-pairs to the RADIUS request
• checks response code, response time and number of response attributes

NOTE: this plugin needs pyrad to work.

For more information and the latest version see: https://thl-cmk.hopto.org/gitlab/checkmk/vendor-independent/check_radius