Dear Alan,
Thank you for your reply, I did follow the rest of that guide and added the following information:
INSERT INTO `radusergroup` (`username`, `groupname`, `priority`) VALUES
('test', 'site_a_admins', 0);
INSERT INTO `radhuntgroup` (`id`, `groupname`, `nasipaddress`, `nasportid`) VALUES
(1, 'site_a', '192.168.56.2', NULL);
INSERT INTO `radgroupcheck` (`id`, `groupname`, `attribute`, `op`, `value`) VALUES
(3, 'site_a_admins', 'Huntgroup-Name', '==', 'site_a');
If I understand the guide correctly only the test user should be able to logon to site_a, however I am also granted access using my test2 user credentials: did I overlook something? Again, thanks in advance!