Try the following: update disconnect { User-Name = "%{User-Name}" Calling-Station-Id = "%{Calling-Station-Id}" WiMAX-AAA-Session-Id = "%{WiMAX-AAA-Session-Id}" (same as that returned during network entry) WiMAX-DM-Action-Code = Deregister-MS } I know this works. I see what is outlined in the documentation I have is basically what you used (with the exception of the wrong attribute for the session ID), but that differs from the requirements outlined in the WiMAX Forum Stage 3 docs. See section 5.4.1.7 RADIUS Disconnect Request Message for the format. Attributes are defined in greater detail in the following sections. Ben From: freeradius-users-bounces+wiechman.lists=gmail.com@lists.freeradius.org [mailto:freeradius-users-bounces+wiechman.lists=gmail.com@lists.freeradius.o rg] On Behalf Of Moayad Mohammad Sent: Tuesday, October 12, 2010 7:11 AM To: freeradius-users@lists.freeradius.org Subject: Disconnect-Request Dears, Can I disconnect connected user or session form freeradius and Wichorus ASN-GW (WIMAX)? If yes how? Am trying to send disconnect request as follow: (Note: I changed all the following values as needed) # echo "Acct-Session-Id=D91FE8E51802097" > packet.txt # echo "User-Name=somebody" >> packet.txt # echo "NAS-IP-Address=10.0.0.1" >> packet.txt # cat packet.txt | radclient -x 10.0.0.1:3799 disconnect secret Sending Disconnect-Request of id 116 to 10.0.0.1 port 3799 Acct-Session-Id = " D91FE8E51802097" User-Name = "somebody" NAS-IP-Address = 10.0.0.1 rad_recv: Disconnect-NAK packet from host 10.0.0.1 port 3799, id=116, length=32 Event-Timestamp = "Oct 12 2010 16:08:21 EEST" Error-Cause = Session-Context-Not-Found When I changed the port to 1813 I got the following error: Sending Disconnect-Request of id 26 to 10.0.0.1 port 1812 Acct-Session-Id = " D91FE8E51802097" User-Name = "somebody" NAS-IP-Address = 10.0.0.1 Sending Disconnect-Request of id 26 to 10.0.0.1 port 1812 Acct-Session-Id = " D91FE8E51802097" User-Name = "somebody" NAS-IP-Address = 10.0.0.1 Sending Disconnect-Request of id 26 to 10.0.0.1 port 1812 Acct-Session-Id = " D91FE8E51802097" User-Name = "somebody" NAS-IP-Address = 10.0.0.1 radclient: no response from server for ID 26 socket 3 Regards, Moayad