My predecessor had commneted out the TLS_CACERT line: #TLS_CACERT /usr/share/ssl/certs/tva_ad.pem TLS_CACERTDIR /usr/share/ssl/certs I think he had also converted the AD server's certificate to PEM format, since I see about 5 .pem files in the ./certs directory I should add.... We are authenticating via Active Directory server, and I am on Linux. I've tried taking the certificate I downloaded from the AD server named in LocalSettings.php and just renaming as .pem, but I get the same errors. Will the TSL_CACERT work with Active Directory configuration? -----Original Message----- From: mediawiki-l-bounces(a)lists.wikimedia.org [mailto:mediawiki-l-bounces@lists.wikimedia.org] On Behalf Of Lane, Ryan Sent: Wednesday, March 26, 2008 10:29 AM To: MediaWiki announcements and site admin list Subject: Re: [Mediawiki-l] LDAP-Error: Can't contact LDAP server You should trust the CA certificate, not the server certificate; if you do so, you won't have this problem next time. If you are on a Linux system, the file you need to modify is going to be /etc/openldap/ldap.conf. You need to add the following options: TLS_CACERT <path to the CA certificate that signed your server certificate> TLS_CACERTDIR <same as above, minus the filename> I believe the ca cert file needs to be in PEM format (base64). If the CA certificate is in DER format for some reason (unlikely), you can convert to PEM with openssl: openssl x509 -inform DER -outform PEM -in cacertinderformat.cer -out cacertinpemformat.cer You can check the certificate information as well: openssl x509 -noout -text -in cacert.cer V/r, Ryan Lane _______________________________________________ MediaWiki-l mailing list MediaWiki-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/mediawiki-l