Java URLConnection error with ntlm authentication, but only on Linux and only Java 7

I changed code in the Client.java class, and recompiled it along with the rest of the com.sun.security.ntlm package, then I created a jar called rt_fix.jar which contains the classes of that particular package. Then I used a java startup option to force it to load my jar before the internal rt.jar.

-Xbootclasspath/p:/path_to_jar/rt_fix.jar

I don't like this solution, but it worked.

Here is the code I changed in Client.java, in the method type3:

Before :

    if (domainFromServer != null) {
        domain = domainFromServer;
    }

After :

    if (domainFromServer != null) {
        //domain = domainFromServer;
    }

It stops Java from altering the domain I try to authenticate to with the one recieved from the server when sending the 3rd part of the NTLM authentication. The domain I was trying to authenticate to is in fact the name of the server because the user accounts are local.

I had the same problem and solved it just by specifying the user name with the domain included in it:

    Authenticator.setDefault(new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(
                    System.getProperty("DOMAIN\\user"),
                    System.getProperty("password").toCharArray() ) ;
        }
    });

Correct is this:

Authenticator.setDefault(new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(
                    "DOMAIN\\user",
                    "password".toCharArray() ) ;
        }
    });