Hi all, I set up a FreeRadius server to receive accounting start/stop packet from GGSN. Then FreeRadius will save the information into MySQL database. However, I see that there is a different between the number of received packets and the Radius response to GGSN [root@radiusd2 sbin]# ./radmin -e "stats client acct" requests 422959 responses 412155 dup 0 invalid 0 malformed 0 bad_signature 0 dropped 0 unknown_types 0 I understand that if GGSN sends an accounting start packet to Radius, it should make a corespondent response or GGSN will resend the packet. So I don't know why there is such a difference. Meanwhile, radius.log is filled with a lot of messages like those: Fri Dec 18 16:55:17 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.55.236', nas '10.0.40.145'] Fri Dec 18 16:55:17 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.61.79', nas '10.0.40.145'] Fri Dec 18 16:55:19 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.67.5', nas '10.0.40.146'] Fri Dec 18 16:55:19 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.93.207', nas '10.0.40.145'] Fri Dec 18 16:55:20 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.136.106', nas '10.0.40.145'] Fri Dec 18 16:55:20 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.56.0', nas '10.0.40.145'] Fri Dec 18 16:55:20 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.81.206', nas '10.0.40.146'] Fri Dec 18 16:55:22 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.35.166', nas '10.0.40.146'] Fri Dec 18 16:55:23 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.55.236', nas '10.0.40.145'] Fri Dec 18 16:55:23 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.61.79', nas '10.0.40.145'] Fri Dec 18 16:55:24 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.51.252', nas '10.0.40.145'] Fri Dec 18 16:55:25 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.93.207', nas '10.0.40.145'] Fri Dec 18 16:55:25 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.67.5', nas '10.0.40.146'] Fri Dec 18 16:55:26 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.56.0', nas '10.0.40.145'] Fri Dec 18 16:55:28 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.35.166', nas '10.0.40.146'] Fri Dec 18 16:55:30 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.51.252', nas '10.0.40.145'] Fri Dec 18 16:55:31 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.93.207', nas '10.0.40.145'] Fri Dec 18 16:55:32 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.49.191', nas '10.0.40.146'] Fri Dec 18 16:55:32 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.56.0', nas '10.0.40.145'] Fri Dec 18 16:55:32 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.75.195', nas '10.0.40.145'] Fri Dec 18 16:55:35 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.91.184', nas '10.0.40.146'] Fri Dec 18 16:55:36 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.113.243', nas '10.0.40.146'] Fri Dec 18 16:55:36 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.95.3', nas '10.0.40.145'] Fri Dec 18 16:55:37 2009 : Error: [sql] stop packet with zero session length. [ip '117.5.51.252', nas '10.0.40.145'] Any suggestion would be appreciated. Regards, Dinh