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PAN-OS Web Interface Reference

NTLM Authentication

Table of Contents

NTLM Authentication

DeviceUser IdentificationUser MappingPalo Alto Networks User-ID Agent SetupNTLM

to authenticate only Windows users. When a client web request matches an Authentication policy rule in which the authentication enforcement object specifies a browser-challenge (see Policies > Authentication), an NTLM challenge transparently authenticates the client. The firewall then collects user mapping information from the NTLM domain.

You can enable NTLM authentication processing for only one virtual system per firewall, which you select in the Location drop-down at the top of the User Mapping page.

Optionally, you can use the firewall to perform NTLM authentication processing for other firewalls by adding it as a User-ID agent to those firewalls. For details, see Configure Access to User-ID Agents.

If you use the Windows-based User-ID agent, NTLM responses go directly to the domain controller where you installed the agent. For details, see the NTLM Authentication field in Device > User Identification > Captive Portal Settings.

Configure Authentication rules to use Kerberos single sign-on

instead of NTLM authentication. Kerberos is a stronger, more robust authentication method than NTLM and does not require the firewall to have an administrative account to join the domain. For details on configuring the authentication methods for Authentication rules, see Objects > Authentication.

The complete procedures to configure Captive Portal

or Windows-based User-ID agents

require additional tasks besides enabling NTLM.

To configure NTLM authentication processing, specify the settings described in the following table.

Field	Description
Enable NTLM authentication processing	Select this option to enable NTLM authentication processing.
NTLM Domain	Enter the NTLM domain name.
Admin User Name (`for the NTLM domain`)	Enter the administrator account that has access to the NTLM domain. Do not include the domain in the Admin User Name field. Otherwise, the firewall will fail to join the domain.
Password/Confirm Password (`for the NTLM domain`)	Enter the password for the administrator account that has access to NTLM domain.

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