dear all
this is my first time posting here. and i hope i will find someone to help me solve some problem.
the problem is I tried to use squid_auth_ldap.
so i wrote the configuration file like below

auth_param basic program /usr/lib/squid/squid_ldap_auth -b "<my user base dn>" -f "uid=%s" -h <my host>

and i tested the correctness with command

/usr/lib/squid/squid_ldap_auth -b "<my user base dn>" -f "uid=%s" -h <my host>
and follow by <username> (1 write space) <password>
it appeared "OK".

So I deployed on testing machine. It's work. then i deploy on real server with 1500 users, It's not work. it appeared box to input username and password 3 times and told "access denial".
i don't know what i do wrong? or are there some option of command missing?
if you can give me some suggestion please help me.
thanks a lot
chan

When you say a box appeared for the username and password, what account was this supposed to be for? Is the LDAP server a windows box running AD? The command line looks to be correct, and my first thought is that the problem has to do with the 1500 user accounts existing and squid basically not being able to validate against them.

thanks for your interested.
the ldap server and the proxy server both are linux os (redhat). and the account that i use, i use the inetOrganize object class to store the personal data (uid, userpassword, mail, sn).