Hi, I'm new to freeradius, currently trying to enforce simultaneous-use = 1 in my wireless network but it is not working. unifi access point > freeradius > samba-ad-dc mysql> SELECT COUNT(*) FROM radacct WHERE username = 'vanessa' AND acctstoptime IS NULL; +----------+ | COUNT(*) | +----------+ | 2 | +----------+ 1 row in set (0.00 sec) I'm using LDAP for authentication through post-auth section in sites-available/default file using Unlang and its working perfectly. (11) if (LDAP-Group == "wifi_users" && NAS-IP-Address == "172.16.200.3") -> TRUE (11) if (LDAP-Group == "wifi_users" && NAS-IP-Address == "172.16.200.3") { (11) update { (11) control:Simultaneous-Use := 1 (11) reply:Class := 0x776966695f7573657273 (11) } # update = noop (11) [noop] = noop (11) } # if (LDAP-Group == "wifi_users" && NAS-IP-Address == "172.16.200.3") = noop (11) ... skipping elsif: Preceding "if" was taken (11) } # post-auth = ok (11) Sent Access-Accept Id 77 from 192.168.255.241:1812 to 172.16.200.3:38173 length 187 LDAP attribute map as per below: mods-available/ldap: update { ... control:Simultaneous-Use += 'radiusSimultaneousUse = 1' sql is included inside session { section as per documentation. Any tips, perhaps I forgot something? Thanks in advance