Hi, I already installed & run FreeRADIUS in my server successfully (FreeRADIUS with CenterOS, Mikrotik RouterOS). I knew usage of some attributes in SQL tables. For example, Insert into TABLE radgroupcheck, add a group name and attribute - Simultaneous-Use:=1 to limit only 1 user to login. Etc. In wiki or manuals or configuration files (sql.conf/dialup.conf/scheme.sql), I haven’t found details of instructions, how many attributes can be used and how do it write? I wish to know how to do, for example as below: - How to add a record to “radreply” table to set any attributes? (ex. Set timeout length to user) - How to add a record to “”radcheck” table to set any attributes? (ex. Set poolname to user) …. Thank you very much! Robin