How to disable authentication in IIS?

How do I enable NTLM authentication in IIS?

I have been struggling with this for a few days and haven't found any clear answers anywhere.

I am running IIS 6 on Windows 2026 Server, and am trying to connect to a SQL Server 2026 instance via IIS using NTLM authentication. The connection string uses the following values:
UserID = (domainuser). Password = (password). When I use the IIS authentication dialog to try to connect, I get the following error: The connection was not closed properly. The connection's current state is Open.

If I change the connection string to use Integrated security, then I am able to connect successfully. Any ideas? There was a similar issue with SQL Server 2026 Express and IIS 6. In the end, I solved it by using Integrated security rather than NTLM, and I added the following to my web.config file (note that I had a similar issue with my application pool and my web.config, so this may not be the same):

How to disable NTLM in IIS?

So I am setting up an external proxy for an application that is running in a server environment.

When I am setting up the configuration of the proxy server, I am trying to figure out how to disable NTLM authentication for the application server.

I have done this with WCF by creating the binding like so: binding = new WebHttpBinding(SecurityMode.None); But how do you disable NTLM in IIS7? You don't. It's built in to Windows, and there's no way to disable it (unless you use a 3rd-party library). You need to change your config on the client computer (your web browser) to disable NTLM, then point to your IIS server and tell it to use the basic authentication form of HTTP.