How do I enable NTLM authentication in IIS?
Open IIS and navigate to the Default Web Site. Open Authentication. Click Windows Authentication > Advanced Settings. De-select Enable Kernel-mode authentication and click OK.
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.
How does IIS NTLM authentication work?
Authentication: The client generates and hashes a response and sends it to the IIS server. The server receives the challenge-hashed response and compares it to what it knows to be the appropriate response. If the received response matches the expected response, the user is successfully authenticated to the server.
How can I check if my IIS site is using NTLM or Kerberos?
One is via the WWW-Authenticate method “NTLM”; the other is via Negotiate. Negotiate uses GSSAPI, which in turn can use various mechanisms; on Windows, this includes both Kerberos and NTLM. Wireshark can decode all of this and show you quickly what’s going on, assuming you’re not using TLS.
How do I set up NTLM authentication?
How to Configure NTLM Authentication
- Go to USERS > External Authentication.
- Click the NTLM tab.
- Enter the NTLM/Kerberos realm name in the Domain Realm field.
- Enter the Netbios Domain Name.
- (Optional) Enter the MS Active Directory Workgroup Name.
What is NTLM authentication used for?
The NTLM authentication protocols authenticate users and computers based on a challenge/response mechanism that proves to a server or domain controller that a user knows the password associated with an account.
Which applications are using NTLM authentication?
Applications That Use NTLM For example, computers still running Windows 95, Windows 98, or Windows NT 4.0 will use the NTLM protocol for network authentication with a Windows 2000 domain.
How do I know if NTLM is authentication?
NTLM auditing To find applications that use NTLMv1, enable Logon Success Auditing on the domain controller, and then look for Success auditing Event 4624, which contains information about the version of NTLM.
Where do I find NTLM authentication?
To find applications that use NTLMv1, enable Logon Success Auditing on the domain controller, and then look for Success auditing Event 4624, which contains information about the version of NTLM.