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RH9 + LDAP: check pass; user unknow



Hi,
I'm using openldap in RH9 for my user DB.
I have configured pam with authconfig.

The problem I get is that for evey login success, I have a login failure
in /var/log/messages in every service(login, pop3, imap, etc).
For example, when I login to IMAP I get:
Jul 15 04:40:38 server imap(pam_unix)[9429]: check pass; user unknown
Jul 15 04:40:38 server imap(pam_unix)[9429]: authentication failure; logname= u
id=0 euid=0 tty= ruser= rhost=
Jul 15 04:40:38 server imapd[9429]: Login user=user1 host=localhost [127.0.0
.1]
Jul 15 04:40:40 server imapd[9429]: Logout user=user1 host=localhost [127.0.
0.1]


I solved this problem by configuring /etc/pam.d/system-auth from this:
auth        required      /lib/security/$ISA/pam_env.so
auth        sufficient    /lib/security/$ISA/pam_unix.so likeauth nullok
auth        sufficient    /lib/security/$ISA/pam_ldap.so use_first_pass
auth        required      /lib/security/$ISA/pam_deny.so

to this:
auth required /lib/security/$ISA/pam_env.so
auth sufficient /lib/security/$ISA/pam_ldap.so
auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok use_first_pass
auth required /lib/security/$ISA/pam_deny.so


The problem is gone, but I don't know if my solution is ok.
Is this the correct solution?
Is the message "check pass; user unknown" a real problem?

Many thanks
Oliver

--
Oliver Schulze L.
<oliver samera com py>





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