Does IIS use NTLM?

Does IIS use NTLM?

IIS web servers commonly use Kerberos (Negotiate) with fallback to NTLM for authenticating domain users to a website. A client that sends a GET request to a web server that is configured with Windows Authentication will receive a 401 Unauthorized response, specifying two authentication choices; Negotiate or NTLM.

What is NTLM in IIS?

Previous versions of the Windows platform provided a rudimentary Single Sign-on (SSO) mechanism known as NT LAN Manager (NTLM) authentication. This method of authentication is based on hashing algorithms providing a similar level of security and operation as that of Basic Authentication.

Is NTLM still in use?

While NTLM is still supported by Microsoft, it has been replaced by Kerberos as the default authentication protocol in Windows 2000 and subsequent Active Directory (AD) domains.

How do I know if I am using NTLM or Kerberos?

If you’re using Kerberos, then you’ll see the activity in the event log. If you are passing your credentials and you don’t see any Kerberos activity in the event log, then you’re using NTLM.

Why doesn’t my reverse proxy work with NTLM authentication?

And that’s why many reverse proxy doesn’t work with NTLM authentication. (like nginx) > They forward HTTP requests correcty but not the TCP packets. Nginx has the functionality to work with NTLM authentication. Keepalive needs to be enabled which is only available trough the http_upstream_module.

Does IIS6 NTLM work over HTTP proxy?

** IIS6.0 NTLM (Integrated Windows authentication) does not work over HTTP proxy connections. 1. Squid’s Connection pinning (NTLM pass through) is really worked?

How to enable reverse proxy functionality in IIS Manager?

Enabling Reverse Proxy functionality 1 Open IIS Manager 2 Select a server node in the tree view on the left hand side and then click on the “Application Request Routing” feature: 3 Check the “Enable Proxy” check box. Leave the default values for all the other settings on this page: More

Can I use Microsoft NTLM with HTTP?

According to this Microsoft TechNet article, you can’t. Microsoft NTLM uses stateful HTTP, which is a violation of the HTTP/1.1 RFC. It relies on authentication (an affair which involves a handshake with a couple of initial 401 errors) and subsequent connections to be done through the exact same connection from client to server.