Example: Configuring 802.1X-PEAP and MAC RADIUS Authentication with EX Series Switches and Aruba ClearPass Policy Manager

CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them in a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

Step-by-Step Procedure

The general steps to configure an EX4300 switch are:

• Configure the connection to the Aruba ClearPass Policy Manager.

• Create the access profile used by the 802.1X protocol. The access profile tells the 802.1X protocol which authentication server to use and the authentication methods and order.

• Configure the 802.1X protocol.

• Configure Ethernet switching on the ge-0/0/10 and ge-0/0/22 access ports.

• Create the firewall policy to be used when a guest laptop connects to a port.

To configure the EX4300 switch:

1. Provide the RADIUS server connection information.

2. Configure the access profile.

3. Configure the 802.1X protocol to use Aruba-Test-Profile and to run on each access interface. In addition, configure the interfaces to use MAC RADIUS authentication and to allow more than one supplicant, each of which must be individually authenticated.

4. Configure the access ports.

5. Configure VLAN 201, which is used for employees that are members of the Finance department.

   Note that for dynamic VLAN assignment to work, the VLAN must exist on the switch before authentication is attempted. If the VLAN doesn’t exist, authentication fails.

6. Configure the firewall filter to be used when a guest laptop connects to a port.

Results

From configuration mode, confirm your configuration by entering the following show commands.

If you are done configuring the device, enter commit from configuration mode.

Step-by-Step Procedure

The general steps for configuring Aruba ClearPass are:

• Add the Juniper Networks RADIUS dictionary file.

• Add the EX4300 as a network device.

• Ensure that the server certificate used for 802.1X PEAP authentication has been installed.

• Add the local user used in this example and assign the user to the Finance group.

• Create two enforcement profiles:

  • A profile that defines the RADIUS attributes for the dynamic firewall filter.

  • A profile that defines the RADIUS attributes for the dynamic VLAN.

• Create two enforcement policies:

  • A policy that is invoked when MAC RADIUS authentication is used.

  • A policy that is invoked when 802.1X authentication is used.

• Define the MAC RADIUS authentication service and the 802.1X authentication service.

• Ensure that the MAC RADIUS authentication service is evaluated before the 802.1X authentication service.

To configure Aruba ClearPass:

1. Add the Juniper Networks RADIUS dictionary file.

   Step-by-Step Procedure

   1. Copy the following contents to a file named Juniper.dct on your desktop.

   2. In Aruba ClearPass, navigate to Administration > Dictionaries > RADIUS and click on Import to import the Juniper.dct file.

      

2. Add the EX4300 switch as a network device.

   Step-by-Step Procedure

   1. Under Configuration > Network > Devices, click Add.

      

   2. On the Device tab, enter the hostname and IP address of the switch and the RADIUS shared secret that you configured on the switch. Set the Vendor Name field to Juniper.

      

3. Ensure that a server certificate for 802.1X PEAP authentication exists.

   Under Administration > Certificates > Server Certificate, verify that Aruba ClearPass has a valid server certificate installed. If it does not, add a valid server certificate. The Aruba ClearPass documentation and your Certificate Authority can provide more details on how to obtain certificates and import them into ClearPass.

   

4. Add a test user to the local user repository.

   This user will be used to verify 802.1X authentication.

   Step-by-Step Procedure

   1. Under Configuration -> Identity -> Local Users, click Add.

   2. In the Add Local User window, enter the user ID (usertest1), user name (Test User), password, and select Employee as the user role. Under Attributes, select the Department attribute and type Finance under Value.

      

5. Configure a dynamic filter enforcement profile.

   This profile defines the RADIUS filter ID attribute, assigning to it the name of the firewall filter you configured on the switch. The attribute is sent to the switch when the endpoint’s MAC address is not in the MAC database, enabling the switch to dynamically assign the firewall filter to the access port.

   Step-by-Step Procedure

   1. Under Configuration > Enforcement > Profiles, click Add.

   2. On the Profile tab, set Template to RADIUS Based Enforcement and type the profile name, Juniper_DACL_1, in Name field.

      

   3. On the Attributes tab, set Type to Radius:IETF, Name to Filter-Id (11), and type the name of firewall filter, mac_auth_policy_1, in the Value field.

      

6. Configure a dynamic VLAN enforcement profile.

   This profile defines the RADIUS attributes for specifying VLAN 201. These RADIUS attributes are sent to the switch when a user who belongs to the Finance department authenticates using 802.1X, enabling the switch to dynamically assign VLAN 201 to the access port.

   Step-by-Step Procedure

   1. Under Configuration > Enforcement > Profiles, click Add.

   2. On the Profile tab, set Template to RADIUS Based Enforcement and type the name of the profile, Juniper_Vlan_201, in the Name field.

      

   3. On the Attributes tab, define the RADIUS attributes as shown.

      

7. Configure the MAC RADIUS authentication enforcement policy.

   This policy tells Aruba ClearPass to take one of the following actions, depending on whether the endpoint’s MAC address is in the RADIUS database:

   • If the address is in the RADIUS database, send an Access Accept message to the switch.

   • If the address is not in the RADIUS database, send an Acess Accept message to the switch along with the name of the firewall filter defined in the MAC RADIUS authentication profile.

   Step-by-Step Procedure

   1. Under Configuration > Enforcement > Policies, click Add.

   2. On the Enforcement tab, type the name of policy (Juniper-MAC-Auth-Policy) and set Default Profile to Juniper_DACL_1 (the profile you defined in Step 5.)

      

   3. On the Rules tab, click Add Rule and add the two rules shown.

      You must add the rules sequentially by creating the first rule in the Rules Editor and clicking Save before you create the second rule.

      

8. Configure the 802.1X enforcement policy.

   This policy tells Aruba ClearPass to take one of the following actions, depending on whether the user belongs to the Finance department or not:

   • If the user belongs to the Finance department, send an Access Accept message to the switch and the VLAN 201 information defined in the 802.1X enforcement profile.

   • If the user does not belong to Finance department, send an Access Accept message to the switch.

   Step-by-Step Procedure

   1. Under Configuration > Enforcement > Policies, click Add.

   2. On the Enforcement tab, type the name of policy (Juniper_Dot1X_Policy) and set Default Profile to [Allow Access Profile]. (This is a prepackaged profile that comes with Aruba ClearPass.)

      

   3. On the Rules tab, click Add Rule and add the rule shown.

      

9. Configure the MAC RADIUS authentication service.

   The configuration for this service results in MAC RADIUS authentication being performed when the RADIUS User-Name attribute and the Client-MAC-Address attribute received have the same value.

   Step-by-Step Procedure

   1. Under Configuration > Services, click Add.

   2. On the Services tab, fill out the fields as shown.

      

   3. On the Authentication tab, remove [MAC AUTH] from the Authentication Methods list and add [EAP MD5] to the list.

      

   4. On the Enforcement tab, select Juniper-MAC-Auth-Policy.

      

10. Configure the 802.1X authentication service.

    Step-by-Step Procedure

    1. Under Configuration > Services, click Add.

    2. On the Service tab, fill out the fields as shown.

       

    3. On the Authentication tab, set Authentication Sources to [Local User Repository][Local SQL DB].

       

    4. On the Enforcement tab, set Enforcement Policy to Juniper_Dot1X_Policy.

       

11. Verify that the MAC RADIUS authentication service policy is evaluated before the 802.1X authentication service policy.

    Because Aruba ClearPass is configured to recognize MAC RADIUS authentication requests by the RADIUS User-Name attribute and the Client-MAC-Address attribute having the same value, it is more efficient to have the MAC RADIUS service policy evaluated first.

    In the Services main window, verify that Juniper-MAC-Auth-Policy appears before Juniper-MAC_Dot1X_Policy in the services list, as shown. If it does not, click Reorder and move Juniper-MAC-Auth-Policy above Juniper-MAC_Dot1X_Policy.

    

Step-by-Step Procedure

This network configuration example uses the native 802.1X supplicant on the Windows 7 laptop. This supplicant must be configured for 802.1X PEAP authentication.

The general steps for configuring the Windows 7 supplicant are:

• Ensure that the Wired AutoConfig service is started.

• Enable 802.1X PEAP authentication for the Local Area Connection.

• Configure the settings for server certificate validation.

• Configure the user credential settings.

1. Ensure that the Wired AutoConfig service is started on the laptop.

   Select Control Panel > Administrative Tools > Services. Started should appear in the Wired AutoConfig Status field.

   

2. Enable 802.1X PEAP authentication for the Local Area Connection.

   Step-by-Step Procedure

   1. Under Control Panel > Network and Sharing Center > Change Adaptor Settings, right-click Local Area Connection and then click Properties.

   2. On the Authentication tab of the Local Area Connection Properties window, configure the properties as shown.

      

3. Configure whether or not the laptop validates the Aruba ClearPass server certificate.

   Click Settings to display the Protected EAP Properties window.

   • If you do not want the laptop to validate the ClearPass server certificate, uncheck Validate server certificate.

   • If you do want the laptop to validate the ClearPass server certificate, check Validate server certificate, type the name of the ClearPass server, and select the trusted root certificate authority for the ClearPass server certificate. The server name must match the CN in the server certificate.

     

4. Configure the user credentials settings.

   This configuration example does not use the Windows Active Directory credentials for user authentication. Instead, it uses the credentials of the local user defined on the Aruba ClearPass server.

   Step-by-Step Procedure

   1. In the Protected EAP Properties window, click Configure to configure Secured password (EAP-MSCHAP v2). Clear the Automatically use my Windows logon name and password check box.

      If your Aurba ClearPass server were configured to use Windows Active Directory to authenticate users, you would leave this option selected.

      

   2. Finish configuring the Protected PEAP Properties by clicking OK.

   3. On the Authentication tab of the Local Area Connection Properties, click Additional Settings.

      

   4. In Advanced settings, select User Authentication for the authentication mode and click Replace credentials.

      

   5. Enter the user ID (usertest1) and password of the local user that you added to local user database on the Aruba ClearPass server.

      

Purpose

Verify that the test user, usertest1, is being authenticated and placed in the correct VLAN.

Action

1. Connect the Windows 7 laptop configured as described in Configuring the Windows 7 Supplicant on the Laptop to ge-0/0/22 on the EX4300 switch.

2. On the switch, type the following command:

3. For more details, including the dynamic VLAN assignment, type:

Meaning

802.1X authentication is working as configured—usertest1 has been successfully authenticated and placed in VLAN 201.

You can use the show dot1x command to also verify that the guest laptop is being properly authenticated using MAC RADIUS authentication.

Purpose

Verify that the endpoints are being correctly authenticated and that the correct RADIUS attributes are being exchanged between the switch and Aruba ClearPass.

Action

1. Go to Monitoring > Live Monitoring > Access Tracker to display the status of the authentication requests.

   The Access Tracker monitors authentication requests as they occur and reports on their status.

   

2. To verify the RADIUS attributes sent by the switch to Aruba ClearPass for a particular request, click the request and then click the Input tab in the Request Details window.

   

3. To verify the RADIUS attributes that Aruba ClearPass sent back to the switch for this request, click the Output tab.

   

Meaning

The Login Status field of the Access Tracker shows that the employee laptop and guest laptop are being successfully authenticated. The request details for the authentication request from usertest1 shows that the switch is sending the correct RADIUS attributes to Aruba ClearPass and that ClearPass is returning to the switch the correct RADIUS attributes specifying VLAN 201.