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Configure 802.1X Wired Access Clients for EAP-TLS Authentication

Updated: March 29, 2012

Applies To: Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2

Use this procedure to configure an Extensible Authentication Protocol–Transport Layer Security (EAP-TLS) profile for authentication that uses smart cards or other certificates.

Membership in Domain Admins , or equivalent, is the minimum required to complete this procedure.

To configure an EAP-TLS profile for wired connections

  1. On the General tab, do the following:

    1. In Policy Name , type a name for the wired network policy.

    2. In Description , type a brief description of the policy.

    3. Ensure that Use Windows Wired Auto Config service for clients is selected.

    4. To permit users with computers running Windows 7 to enter and store their domain credentials (username and password), which the computer can then use to log on to the network (even though the user is not actively logged on), in Windows 7 Policy Settings , select Enable Explicit Credentials .

    5. To specify the duration for which computers running Windows 7 are prohibited from making auto connection attempts to the network, select Enable Block Period , and then in Block Period (minutes) , specify the number of minutes for which you want the block period to apply. The valid range of minutes is 1-60.

      noteNote
      For more information about the settings on any tab, press F1 while viewing that tab.

  2. On the Security tab, do the following:

    1. Select Enable use of IEEE 802.1X authentication for network access .

    2. In Select a network authentication method , select Smart Card or other certificate .

    3. In Authentication mode , select from the following, depending on your needs: User or Computer authentication , Computer authentication , User authentication , Guest authentication . By default, User or Computer authentication is selected.

    4. In Max Authentication Failures , specify the maximum number of failed attempts allowed before the user is notified that authentication has failed. By default, the value is set to “1.”

    5. To specify that user credentials are held in cache, select Cache user information for subsequent connections to this network .

  3. To configure Single Sign On or advanced 802.1X settings, click Advanced . On the Advanced tab, do the following:

    1. To configure advanced 802.1X settings, select Enforce advanced 802.1X settings , and then modify — only as necessary — the settings for: Max Eapol-Start Msgs , Held Period , Start Period , Auth Period , Eapol-Start Message .

    2. To configure Single Sign On, select Enable Single Sign On for this network , and then modify — as necessary — the settings for:

      • Perform Immediately before User Logon

      • Perform Immediately after User Logon

      • Max delay for connectivity

      • Allow additional dialogs to be displayed during Single Sign On

      • This network uses different VLAN for authentication with machine and user credentials

  4. Click OK . The Advanced Security Settings dialog box closes, returning you to the Security tab. On the Security tab, click Properties . The Smart Card or other Certificate Properties dialog box opens.

  5. On the Smart Card or other Certificate Properties dialog box, do the following:

    1. In When connecting , select either Use my smart card , or select both Use a certificate on this computer and Use simple certificate selection (Recommended) .

    2. Select Validate server certificate .

    3. To specify which Remote Authentication Dial-In User Service (RADIUS) servers your wired access clients must use for authentication and authorization, in Connect to these servers , type then name of each RADIUS server, exactly as it appears in the subject field of the server’s certificate. Use semicolons to specify multiple RADIUS server names.

    4. In Trusted Root Certification Authorities , select the trusted root certification authority (CA) that issued the server certificate to your server running Network Policy Server (NPS).

      noteNote
      This setting limits the trusted root CAs that clients trust to the selected values. If no trusted root CAs are selected, then clients will trust all trusted root CAs in their trusted root certification authority store.

    5. To specify that clients use an alternate name for the access attempt, select Use a different user name for the connection .

    6. For improved security and a better user experience, select Do not prompt user to authorize new servers or trusted certification authorities .

    7. Click OK to save the Smart Card or other Certificate Properties settings. Click OK again to return to the New Wired Network Policy Properties dialog box.

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