• SonicOS 7.1
• About SonicOS
  • Working with SonicOS
  • SonicOS Workflow
  • How to Use the SonicOS Administration Guides
  • Guide Conventions
• About User Management
  • Using Local Users and Groups for Authentication
    • About User Databases
    • About User Groups
  • Using RADIUS for Authentication
  • Using LDAP/Active Directory/eDirectory Authentication
    • LDAP Terms
    • LDAP Directory Services Supported in SonicOS
    • LDAP User Group Mirroring
      • Integrating LDAP into the SonicOS Network Security Appliance
        • Preparing Your LDAP Server for Integration
        • Configuring the CA on the Active Directory Server
        • Exporting the CA Certificate from the Active Directory Server
        • Importing the CA Certificate into SonicOS
      • LDAP Group Membership by Organizational Unit
  • Using RADIUS
  • Using TACACS+
  • Using Single Sign-On
    • What is Single Sign-On?
    • Benefits of SonicWall SSO
    • Platforms and Supported Standards
    • How Does Single Sign-On Work?
      • SonicWall SSO Authentication Using the SSO Agent
      • SonicWall SSO Authentication Using the Terminal Services Agent
      • SonicWall SSO Authentication Using Browser NTLM Authentication
    • How Does SSO Agent Work?
      • Logging
    • How Does Terminal Services Agent Work?
      • Multiple TSA Support
      • Encryption of TSA Messages and Use of Session IDs
      • Connections to Local Subnets
      • Non-Domain User Traffic from the Terminal Server
    • How Does Browser NTLM Authentication Work?
      • NTLM Authentication of Domain Users
      • NTLM Authentication of Non-Domain Users
      • Credentials for NTLM Authentication in the Browser
    • How Does RADIUS Accounting for Single-Sign-On Work?
      • RADIUS Accounting Messages
      • SonicWall Compatibility with Third-Party Network Appliances
      • Proxy Forwarding
      • Non-Domain Users
      • IPv6 Considerations
      • RADIUS Accounting Server Port
    • Installing the Single Sign-On Agent and/or Terminal Services Agent
      • Installing the SonicWall SSO Agent
      • Installing the SonicWall Terminal Services Agent
        • Accessing the SonicWall Terminal Services Agent
        • Creating a SonicWall TSA Troubleshooting Report
    • Single Sign-On Advanced Features
      • Viewing SSO Mouseover Statistics
      • Using the Single Sign-On Statistics in the TSR
      • Examining the Agent
      • Remedies
    • Configuring Access Rules
      • Automatically Generated Rules for SonicWall SSO
      • Accommodating Mac and Linux Users
        • Using SSO on Mac and Linux With Samba
        • Using SSO on Mac and Linux Without Samba
      • Allowing ICMP Pings from a Terminal Server
    • Managing SonicOS with HTTP Login from a Terminal Server
    • Viewing and Managing SSO User Sessions
      • Logging Out SSO Users
      • Configuring Additional SSO User Settings
      • Viewing SSO and LDAP Messages with Packet Monitor
      • Capturing SSO Messages
      • Capturing LDAP Over TLS Messages
    • Multiple Administrator Support
      • Preempting Administrators
      • Logging in with Administrator Rights
        • Disabling the User Login Status Popup
      • Configuring Multiple Administrator Support
        • Configuring Additional Administrator User Profiles
        • Configuring Administrators Locally when Using LDAP or RADIUS
        • Verifying Multiple Administrators Support Configuration
        • Viewing Multiple Administrator Related Log Messages
• Configuring Users Status
  • Displaying Inactive Users
  • Displaying Unauthenticated Users
  • Displaying the User Count
  • Refreshing the Users List
  • Logging Out Users
    • Logging Out a Single User
    • Logging Out Multiple Users
• Configuring User Settings
  • User Login Settings
    • Setting the Authentication Method for Login
    • Configuring RADIUS Authentication
      • Configuring RADIUS Settings
      • Configuring RADIUS Users Settings
      • Testing RADIUS Settings
    • Configuring LDAP
      • Configuring LDAP Setting
      • Configuring Referrals
      • LDAP User Settings
      • Enabling LDAP Relay
      • Testing LDAP Settings
    • Configuring TACACS+
      • Configuring TACAS+ Settings
      • Configuring TACACS+ User Settings
      • Testing TACACS+ Settings
    • Requiring User Names be Treated as Case-Sensitive
    • Preventing Users From Logging in from More than One Location
    • Forcing Users to Log In Immediately After Changing Their Passwords
    • Displaying User Login Information Since the Last Login
  • Setting the Single-Sign-On Methods
    • Configuring SSO
      • SSO Agents
      • Users
      • Enforcement
      • Terminal Services
      • NTLM
      • RADIUS Accounting
      • 3rd Party API
      • Capture Client
      • Test
  • One-Time Password Settings
  • Configuring the User Web Login Settings
    • Setting the Timeout for the Authentication Page
    • Setting How the Browser is Redirected
    • Managing Redirections to the Login Page
    • Using a CHAP challenge to Authenticate Users
    • Redirecting Unauthenticated Users
    • Authenticating user's multiple IP addresses
  • Adding URLs to Authentication Bypass
  • User Session Settings
    • User Session Settings for SSO-Authenticated Users
    • User Session Settings for Web Login
  • Accounting
    • Configuring RADIUS Accounting
      • Sending RADIUS Accounting Information to Servers
      • Configuring User Accounting
      • Testing RADIUS Accounting
      • Editing RADIUS Servers
      • Deleting RADIUS Servers
    • Configuring TACACS+ Accounting
      • Configuring User Accounting
      • Testing TACACS Accounting
      • Editing TACACS Servers
      • Deleting TACACS Servers
  • [[[Missing Linked File System.LinkedTitle]]]
    • • Post-Login Acceptable Use Policy Example Template
      • Post-Login Acceptable Use Policy Preview Message
• Configuring and Managing Partitions
  • Authentication Partitioning Settings
  • Authentication Partitions
    • Adding Partitions and Subpartitions
    • Editing Partitions
    • Deleting Partitions and Subpartitions
      • Deleting All Partitions
      • Deleting Multiple Partitions
      • Deleting a Single Partition
  • Assigning Servers, Agents, and Clients
    • Manually Assigning Servers, Agents, and Clients
    • Automatically Assigning Servers, Agents, and Clients
  • Partition Selection Policies
    • Adding Partition Policies
    • Deleting Partitions Policies
      • Deleting All Partitions Policies
      • Deleting Multiple Partitions Policies
      • Deleting a Single Partition Policiy
• Configuring Local Users and Groups
  • About Authentication and Passwords
    • Using Two-Factor Authentication
    • Enforcing First Login Password Change
  • Configuring Local Users
    • Quota Control for all Users
    • Viewing Local Users
    • Adding Local Users
      • Configuring Local Users Settings
      • Configuring Local Users Groups
      • Configuring Local Users VPN Access
      • Configuring Local Users User Quota
    • Editing Local Users
  • Configuring Local Groups
    • Adding Local Groups
      • Configuring Local Groups Settings
      • Configuring Local Group Settings Members
      • Configuring Local Group Settings VPN Access
      • Configuring Local Group Settings Administration
    • Editing Local Groups
  • Settings
• Configuring Guest Services
  • Adding Guest Profiles
  • Editing Guest Profiles
  • Deleting Guest Profiles
• Configuring Guest Accounts
  • Adding Guest Accounts
  • Editing Guest Accounts
  • Deleting Guest Accounts
    • Deleting a Guest Account
    • Deleting Multiple Guest Accounts
    • Deleting All Guest Accounts
• Managing Guest Status
  • Logging Out Guests
  • Logging Out All Guests
• SonicWall Support
  • About This Document

NTLM

NTLM browser authentication allows the SonicWall to automatically authenticate the user of a browser directly with no SSO agent involvement.

NTLM authentication is supported by Mozilla-based browsers and can be used as a supplement to identifying users via an SSO agent or, with some limitations, on its own without the agent. The firewall interacts directly with the browser to authenticate the user. Users logged in with domain credentials are authenticated transparently; in other cases the user may need to enter credentials to login to the appliance, but should only need to do so once as the credentials are saved.

1. Navigate to the Device > Users > Settings > Authentication page.
2. Next to Configure SSO, click Configure.

   The SSO Configuration page is displayed.

3. Under the NTLM tab, select the following:

   1. Select Use NTLM to authenticate HTTP/HTTPS traffic to use NTML authentication.

   2. Select the Use the domain from the LDAP configuration to use the same domain that is used in the LDAP configuration.

   3. In Authentication domain, enter the full DNS name of the firewall’s domain in the form “www.somedomain.com”

   4. In Redirect the browser to this appliance via, select one of the following options to determine how a user’s browser is initially redirected to the firewall’s own Web server:

      • The interface IP address: Select this to redirect the browser to the IP address of the appliance Web server interface.

      • Its domain name from a reverse DNS lookup of the interface IP address: Enables the Show Reverse DNS Cache button at the bottom of the window; when clicked, a popup displays the appliance Web server’s Interface, IP Address, DNS Name, and TTL in seconds. Click the button to verify the domain name (DNS name) being used for redirecting the user’s browser.

      • Its configured domain name: Use the firewall's domain name as configured on the Device > Settings > Administration page.

      • The name from the administration certificate: Use the imported certificate that is selected for HTTPS Web Management on the Device > Settings > Administration page.

   5. Enter a number of retries in the Maximum retries to allow on authentication failure.

   6. If you are using older legacy servers that require legacy LAN Manager components to be included in NTLM messages, select the Forward legacy LanMan in NTLM.

   7. To detect when users log out, select the polling method to be used by the appliance for Windows, Linux, and Macintosh users in the On the poll timer, for users authenticated user via NTLM options. Select the one of the following methods for users on each type of computer:

      • Re-authenticate via NTLM: This method is transparent to the user if the browser is configured to store the domain credentials, or the user instructed the browser to save the credentials.

      • Don’t re-authenticate: If you select this option, logout will not be detected other than via the inactivity timeout.

4. Click Save.