Hello freeradius-users, so radius will check username, password and mac address from radius database as subject.. I can't find any idea of this.. :( I already set up this in sql.conf authorize_check_query = "SELECT id,UserName,Attribute,Value,op FROM ${authcheck_table} WHERE STRCMP(Username, '%{SQL-User-Name}') = 0 and (mac='%{Calling-Station-Id}' or isnull(mac) or mac='') ORDER BY id" postauth_query = "UPDATE ${authcheck_table} set mac='%{Calling-Station-Id}' WHERE Username = '%{SQL-User-Name}' and (mac='' or isnull(mac))" then add this to radreply table in radius database: UserName Attribute op value hendy Calling-Station-Id = 00:0D:87:C7:13:81 i use MikroTik and PPPoE then i try reconnect from different mac address with username: hendy but still connected :( -- Best regards, Yudi