Re: tls_checkpeer yes problems

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On [Thu, 29.01.2009 13:32], John A. Sullivan III wrote:
>Hello, all.  This may be a bit off-topic as it is primarily an ldap
>client issue but I am having a bear of a time getting my test centos
>clients to access fds.  The problem is tls_checkpeer.  I do want it set
>to yes but this breaks access.  It is as if the directory server's cert
>cannot be validated against the CA cert.  Here are the pertinent
>settings from my centos client ldap.conf (as you can see, I've tried
>many combinations):
>
>uri ldap://ldap.mycompany.com/
>#host ldap.mycompany.com
>#ssl on
>ssl start_tls
>#tls_cacertdir /etc/pki/tls/certs
>tls_cacertfile /etc/pki/tls/certs/SSICA.pem
>pam_password md5
>tls_checkpeer yes
>tls_ciphers TLSv1
>
>An strace shows that the SSICA.pem file is opened.  Apparently, this is
>a problem in Ubuntu because of a change to gnutls.  However, I can
>confirm the combination of uri ldap://, ssl start_tls, and tls_certfile
>rather than tls_certdir work on Ubuntu.  My problem is redhat style
>systems.
>
>Our test bed is CentOS 5.2.  Does anyone have this working on newer
>redhat based systems? If so, with what configuration? Thanks - John

gnutls has a bug in some ubunto versions. This prevents correct
certificate validation. See here:

https://bugs.launchpad.net/ubuntu/+source/gnutls12/+bug/305264

How did you test access to FDS on Red Hat systems? If you use OpenLDAP
commandline tools like ldapsearch to get access to FDS, you have to run
cacertdir_rehash on the directory where the CA cert is stored. What is
the output from:

# openssl s_client -connect your_host_fqdn:443

(make sure you have the cacert available in ca-bundle.crt)

Happy Day.
Thorsten
  

-- 
"Eternity is a very long time, especially towards the end."
  ? Stephen Hawking

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