Hello, gents Can you advise me with my issue with simultaneous logins, please? I can't use radutmp because NAS port identifies only SSID (in case of Cisco WLC 5508). So it is always the same. And there are always only two records in the file. I switched to SQL method: sites-available/default session { #radutmp # # See "Simultaneous Use Checking Queries" in sql.conf sql } acct_unique { key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address" } But all my seesions became "closed" after less than 2 minutes with acctterminatecause = Stale-Session (radacct table) So this query doesn't work simul_count_query = "SELECT COUNT(*) \ FROM ${acct_table1} \ WHERE username = '%{SQL-User-Name}' \ AND acctstoptime IS NULL" Who decides that the session is stale? And how can I avoid it?