Hi! Experts I want to achieve user traffic volume limit per month, but found there is a limit for user traffic to exceed 4Gbytes. Below is my DB structure, you could see the "Max-Monthly-Trafficâ groupcheck attribute is 10Gbytes and it type is âvarchar", but it seems system deal it like a âinteger" type, so it cannot exceed 4Gbytes. mysql> desc radgroupcheck; +-----------+------------------+------+-----+---------+---------------- + | Field | Type | Null | Key | Default | Extra | +-----------+------------------+------+-----+---------+---------------- + | id | int(11) unsigned | NO | PRI | NULL | auto_increment | | groupname | varchar(64) | NO | MUL | | | | attribute | varchar(64) | NO | | | | | op | char(2) | NO | | == | | | value | varchar(253) | NO | | | | +-----------+------------------+------+-----+---------+---------------- + 5 rows in set (0.00 sec) mysql> select * from radgroupcheck; +----+--------------------+-----------------------+----+------------+ | id | groupname | attribute | op | value | +----+--------------------+-----------------------+----+------------+ | 1 | disabled | Auth-Type | := | Reject | | 25 | group2 | Max-Monthly-Traffic | := | 10737418240| | 33 | microshield | Acct-Interim-Interval | := | 300 | +----+--------------------+-----------------------+----+------------+ 3 rows in set (0.00 sec) In FreeRADIUS debug mode, we could see that the rlm_sqlcounter âcheck_itemâ is always warpped in 4294967296 just like below: [monthlytrafficcounter] expand: %{sql:SELECT SUM(acctinputoctets+acctoutputoctets) FROM radacct WHERE username='lichan' AND UNIX_TIMESTAMP(acctstarttime) > '1425139200'} -> 7250810110 rlm_sqlcounter: (Check item - counter) is less than zero rlm_sqlcounter: Rejected user lichan, check_item=2147483648, counter=3955842814 ++[monthlytrafficcounter] returns reject And this always leads users been rejected in authentication procedure. Do you have any experience in this and could shed some light? Thanks for your great help! BR! Chen Jiang Microshield Technology Co., Ltd å京å¸æµ·æ·åºè¥¿ä¸ç¯åè·¯50å·è±ªæ大å¦C2座18-19å± 100048 (86)10-88518768 (86)18612696123 [1]chenjiang@microshield.com.cn References 1. mailto:chenjiang@microshield.com.cn