Unable to establish secure connection with the server , when using LDAP

Question

I am working on an asp.net mvc web application, and I have added the following provider to my asp.net web.config:

<system.web>
    <membership>
      <providers>
        <add name="TestDomain1ADMembershipProvider" type="System.Web.Security.ActiveDirectoryMembershipProvider,System.Web, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a,Version=4.0.0.0" connectionStringName="TestDomain1ConnectionString" connectionUsername="ad-domainA.intra\it360ad.user" connectionPassword="$$$$$3" />

      </providers>
    </membership>

&

<add name="TestDomain1ConnectionString" 
     connectionString="LDAP://10.211.12.30.ad-domainA.intra/CN=Users,DC=ad-domainA,DC=intra" />

but when the users try to access the application and they enter username and password , this will raise the following exception :

Unable to establish secure connection with the server

So what might be the problem? and also is it right to include my server IP address inside the connection string as I am doing ?

EDIT

I changed my setting to be:

 <system.web>
        <trust level="Full" originUrl="" />
        <membership>
          <providers>
            <add name="TestDomain1ADMembershipProvider" type="System.Web.Security.ActiveDirectoryMembershipProvider,System.Web, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a,Version=4.0.0.0" connectionStringName="TestDomain1ConnectionString" connectionUsername="it360ad.user" connectionPassword="$$$$$" />

          </providers>
        </membership>

&

  <add name="TestDomain1ConnectionString" 
       connectionString="LDAP://ad-domainA.intra/OU=TM,DC=ad-doaminA,DC=intra" />

but currently the following check

if(domainProvider.ValidateUser(model.UserName, model.Password)

inside the Account controller action method will return

The user name or password provided is incorrect

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public ActionResult Login(LoginModel model, string returnUrl)
{
   MembershipProvider domainProvider;

   domainProvider = Membership.Providers["TestDomain1ADMembershipProvider"];

   // Validate the user with the membership system.
   if (domainProvider.ValidateUser(model.UserName, model.Password))
   {
       //code goes here
   }
   else
   {
       ModelState.AddModelError("", "The user name or password provided is incorrect.");
       return View(model);
   }

Can you advice why the validation will always fail ?

Thanks

Answer 1

Try using this connectionString="LDAP://10.211.12.30:389 />. I had the same problem and I found that I had to remove anything else after :389in the connection string.

I dont know why that is but it worked for me..... Hope this helps