[CentOS] Problems with nss_ldap - where to start?

m.roth at 5-cent.us m.roth at 5-cent.us
Wed Dec 16 19:33:50 UTC 2009

> I've been unsuccessfully trying to get nss_ldap to work.  I've chased down
> hundreds of google searches over the last 3 days, and I can't seem to get
> a
> centos system to authenticate against ldap.
> Every daemon on the system is running into the same problem:
> nss_ldap: could not search LDAP server - Server is unavailable
> sshd, nscd, httpd, you name it..
> slapd is clearly running, telnet localhost 389 actually connects me to it.
> I've run authconfig, /etc/sysconfig/authconfig agrees.
> I'm at a complete and utter loss.  I've followed every how-to out there,
> RH, Openldap, Debian, FreeBSD  I can verify ldap is working, I can't seem
> to get any PAM applications to use it.

First question: do you have tls enabled on the client, and not the server,
or vice versa?

Second question: on the server, can you do a search?

Handy tool: webmin has a whole ldap section, and can give you a *lot* of
clues as to what's going wrong.


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