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LDAPs on windows IIS - certificate install?


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I have an application that uses LDAP to authenticate with my company's AD servers under IIS windows servers. They now want us to use LDAP secured. They have given me the ldaps site and company certificates. However, when I try to use it, I get Can't contact LDAP server.

I think it is because PHP can't recognize the certificates. I did install them by right clicking on them and pressing install, but I don't think that flies for PHP.

How do I get these certificated installed so PHP will recognize them?


$ds = ldap_connect('ldaps://xxx.xxcom:636');
ldap_bind($ds, 'CN=xxx,OU=APPIDS,DC=us,DC=bank-dns,DC=com', 'xxx') or die('ERROR');
echo 'SUCCESS';

Warning: ldap_bind(): Unable to bind to server: Can't contact LDAP server in C:\PHP81\ldaptest.php on line 3



2024-03-05 15:48 CST LDAP ldap_api.php:373 ldap_authenticate_by_username() Binding to LDAP server
2024-03-05 15:48 CST LDAP ldap_api.php:67 ldap_connect_bind() Checking syntax of LDAP server URI 'ldaps://xxx.xx.com:636'.
2024-03-05 15:48 CST LDAP ldap_api.php:76 ldap_connect_bind() LDAP server URI syntax check succeeded
2024-03-05 15:48 CST LDAP ldap_api.php:89 ldap_connect_bind() Setting LDAP protocol version to 3
2024-03-05 15:48 CST LDAP ldap_api.php:142 ldap_connect_bind() Attempting bind to ldap server as 'CN=xxx,OU=APPIDS,DC=us,DC=bank-dns,DC=com'
2024-03-05 15:48 CST LDAP ldap_api.php:50 ldap_log_error() ERROR #-1: Can't contact LDAP server
2024-03-05 15:48 CST LDAP ldap_api.php:152 ldap_connect_bind() Bind to ldap server failed

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