I took a look at the SQL Queries used by freeradius to check the logins and decided to run them manually on my sql database:
mysql> SELECT COUNT(*) FROM radacct WHERE username = 'Kat' AND acctstoptime = 0; +----------+ | COUNT(*) | +----------+ | 16 | +----------+ 1 row in set (0.00 sec)
So, you have 16 open sessions for that user. Why? Do they have some sentimental value to you? If not, just delete them. They most likely occured when your radius server was down while users logged off.
The problem is, if you try to log this person in the server saying that they are already logged in, because the simul_count_query is picking up *ALL* rows which have accountstoptime = 0. This is an problem because all the accounting records are kept in the same place as the start and stop records, which means that there will always be records with an acctstoptime=0 in that table. Am I doing anything wrong here? Any tips on how to fix this problem would be much appreciated.
It looks to me that you are switching off your radius server and not clearing up the mess in accounting records that happens because of that. If you are not doing that but Stop packets are being lost because of poor and unreliable communication between radius server and your NAS, you need to fix that. Ivan Kalik Kalik Informatika ISP