Authenticate credentials remote server

Question

I'm trying to check if the username/password for a remote computer, entered by a user on a WPF form are correct.

I have those strings: username, password and ip address.

I saw something about about "DirectoryEntry" but couldn't get it to work - the user is always authenticated even when the password is incorrect.

Any ideas?

Answer 1

There are multiple ways, but the way I've done it before is like this (using DirectoryEntry), it goes like this:

string ldapConnectionString = @"LDAP://[domain_server]/CN=Users,DC=[domain]"

using (var de = new DirectoryEntry(
    ldapConnectionString, "username", "password", 
    AuthenticationTypes.Secure))
{
    return de.NativeObject != null; // if not null -> user is valid
}

Edit: What this code will do is, validate a combination of a username/password against active directory. I think I misunderstood you (if what you mean is, to see if a user CAN connect to a particular server -> as in HAS PERMISSION to, I'm not quite sure how to do that, or even if it's possible).