Dear all, Sorry to bother you again. After googled the error messages: Sep 29 17:11:06 localhost ser[4408]: rc_ip_hostname: couldn't look up host by addr: DA61FC29 Sep 29 17:11:06 localhost ser[4408]: rc_send_server: no reply from RADIUS server unknown:1812 I found this: http://forums.staros.com/showthread.php?p=21895 "The key thing most people miss is that the IP you enter in the radius server for the remote that will talk to it has to be the IP of the device that the server is listening on. Most people simply use the IP of the gateway device and that is not correct unless that device also has Hotspot or PPPoE or some other service that talks to radius." I still don't know how to check his words are right. What do you think? Shuai http://www.goldentek.biz