C# LDAP SSL connection fails

[reachb4]

I am using the following code to connect to aLDAP server using SSL. The following code will work only if i turn off the SSL flag. Can any one please tell me what am i missing here to do a SSL connection.

Every time the findAll is called it is saying that

the server is not operational

Do i need to provide any NetworkCredentials?

ldapUrl="LDAP://x500.bund.de:636/l=Neutral,ou=BMI,o=Bund,c=DE";

DirectoryEntry dEntry =null;

// for anonymous login. x500.bund.de supports this.
dEntry = new DirectoryEntry(ldapUrl, null, null, 
            AuthenticationTypes.SecureSocketsLayer | AuthenticationTypes.Secure); 

DirectorySearcher search = new DirectorySearcher(dEntry);

search.Filter = "((objectClass=*))";    
search.Filter = searchQuery;
SearchResultCollection scl = search.FindAll();

[Craig Gemmill]

That's usually a certificate issue.

Check the system event log on the client machine and see if there are any ssl/schannel errors.

In case these errors are being suppressed: Make sure that the certificate matches everything you're expecting. Host name, expiration, etc.

[ronenfe]

I suggest you use Softtera Ldap software to test connections to Ldap before trying with the code. It will give you detailed error.