Wi-Fi employee access – Cisco Wireless Controller

In this topic, you will learn how to configure a Cisco Wireless Controller to work together with Portnox™ Cloud and 802.1X RADIUS authentication for Wi-Fi connections.

Cisco Virtual Wireless Controller

This section contains an example configuration for the Cisco Virtual Wireless Controller.

Important:

This guide gives general instructions for integrating Portnox Cloud with specific third-party devices. We try to provide useful examples for common models, but settings can differ between manufacturers, models, and environments. Because of this, we cannot guarantee these steps will work in every case. For questions or problems with RADIUS setup – which is an industry standard and not specific to Portnox – or with device-specific settings and troubleshooting, we recommend checking the device manufacturer’s documentation and contacting their support team. Portnox Support can help when possible, but detailed setup of third-party devices is usually best handled by the manufacturer. We also recommend updating your NAS device firmware to the latest version, as old firmware can cause issues.

Important:

All values in this configuration are examples. Make sure to adjust the configuration to your individual profile names, RADIUS server addresses, ports, and keys by replacing the values that are presented as underlined italics.

In the top menu of the Cisco Wireless Controller web interface, click on the SECURITY option
In the left-hand side menu, select the AAA > RADIUS > Authentication options.
In the RADIUS Authentication Servers pane, click on the New... button in the top-right corner.
In the RADIUS Authentication Servers > New pane, enter the details of the Portnox Cloud RADIUS server that you created earlier: the Server IP Address, the authentication Port Number, and the Shared Secret. Set the timeout to 30 seconds. Then, click on the Apply button in the top-right corner.

Note:
The Support for CoA switch should be set to Enable if you want to use the CoA feature and/or the IPSK feature of Portnox Cloud.
If you use two Cloud RADIUS servers in both regions, repeat the above steps for the second RADIUS server.

The above screenshot shows an example configuration for two Cloud RADIUS region authentication servers. Adjust the IP addresses and port numbers to your tenant configuration.
In the left-hand side menu select AAA > RADIUS > Accounting menu option.
In the RADIUS Accounting Servers pane, click on the New... button in the top-right corner.
In the RADIUS Accounting Servers > New pane, enter the details of the Portnox Cloud RADIUS server that you created earlier: the Server IP Address, the accounting Port Number, and the Shared Secret. Set the timeout to 30 seconds. Then, click on the Apply button in the top-right corner.
If you use two Cloud RADIUS servers in both regions, repeat the above steps for the second RADIUS server.

The above screenshot shows an example configuration for two Cloud RADIUS region accounting servers. Adjust the IP addresses and port numbers to your tenant configuration.
In the top menu of the Cisco Wireless Controller web interface, click on the WLANs option
In the WLANs pane, select the Create New option from the drop-down menu, and then click on the Go button.

Note:
Instead of creating a new WLAN, you can edit an existing WLAN by clicking on the number in the WLAN ID column.
In the WLANs > New pane, enter the Profile Name and the SSID for the secure SSID that you want to create, and then click on the Apply button in the top-right corner.
In the WLANs > Edit pane, click on the Security tab and select the following options in the Layer 2 tab that is opened by default:
1. In the Layer 2 Security field, select the WPA2+WPA3 option.
  Note:
  If you want to use this SSID to connect IoT devices that do not support 802.1x, select the None option and activate the MAC Filtering checkbox instead.
2. In the Security Type field, select the Enterprise option.
3. In the Authentication Key Management section, activate the Enable checkbox next to the 802.1X-SHA1 option.
Click on the AAA Servers tab and in the Authentication Servers and Accounting Servers columns, select the relevant servers that you defined earlier. Then, click on the Apply button in the top-right corner.

Important:
If you want to use the IPSK feature of Portnox Cloud, additionally, activate the RADIUS Server Overwrite Interface checkbox.

The following screenshot shows an example configuration for two Cloud RADIUS servers. Adjust the IP addresses and port numbers to your tenant configuration.

Result: Your Wi-Fi devices can now access the protected Wi-Fi network, using the Portnox Cloud RADIUS servers for authentication.

Cisco 9800

This section contains an example configuration for the Cisco Catalyst 9800 Wireless Controllers and Portnox Cloud RADIUS servers.

Add the RADIUS server(s):
1. In the left-hand side menu, select the following option: Configuration > Security > AAA.
2. In the right-hand side pane, in the Servers / Groups tab, in the RADIUS vertical tab, click on the + Add button.
3. In the Create AAA Radius Server window, enter the details of the Portnox Cloud RADIUS server that you created earlier:
  - In the Name field, enter a display name for this server.
  - In the Server Address field, paste the Cloud RADIUS IP value from Portnox Cloud.
  - In the Key Type field, select the Clear Text option.
  - In the Key and Confirm Key fields, paste the Shared Secret value from Portnox Cloud.
  - In the Auth Port and Acct Port fields, paste the Authentication Port and Accounting Port values from Portnox Cloud.
  - In the Server Timeout and Retry Count fields, we recommend that you use the values 30 and 5 but you may need to adjust those values to match your ISP latency and load.
  - In the Support for CoA field, set the switch to DISABLED if using Cloud RADIUS servers. To learn more about using CoA with Local RADIUS, see the following topic: Enable the RADIUS Change of Authorization feature.
  - Then, click on the Apply to Device button to add the server.
  Note:
  You can also do the above steps for the local RADIUS server if you prefer to use those, not Cloud RADIUS.
4. Optional: Repeat the above step for the second Portnox Cloud RADIUS server or for another local RADIUS server.
Create the RADIUS server group:

Note:
You need to create a server group even if you added only one RADIUS server.
1. Click on the Server Groups tab on the right-hand side, and in the RADIUS vertical tab, click on the + Add button to create a server group.
2. In the Create AAA Radius Server Group window, enter the display Name for the group and using the > button, move the names of the RADIUS servers that you created to the Assigned Servers area, then click on the Apply to Device button.
  
  Note:
  You can use the default values for other fields or adjust them to your environment as needed.
Create the AAA method lists:
1. Click on the AAA Method List tab, and in the Authentication vertical tab, click on the + Add button.
2. In the Quick Setup: AAA Authentication window, enter the display Method List Name, in the Type field, select the dot1x option, and move the server group you just created to the Assigned Server Groups area. Then, click on the Apply to Device button.
3. Optional: Repeat the above two steps in the Authorization (Type: Network) and Accounting tabs (Type: Identity).
  
  Note:
  If you skip configuring the Authorization and Accounting method lists, clients can still authenticate and connect over 802.1X using just the Authentication list, but they’ll be locked to the static VLAN/ACL settings in the Policy Profile rather than any dynamic per-user attributes from RADIUS, and you’ll lose session accounting visibility.
Create the WLAN:
1. In the left-hand side menu, select the following option: Configuration > Tags & Profiles > WLANs.
2. In the right-hand side pane, click on the + Add button.
3. In the Add WLAN window, in the General tab, enter the display Profile Name, the SSID, and set the Status switch to Enabled.
4. In the Security > Layer2 tab, select the WPA types that you want to support for this WLAN.
  
  You can support WPA + WPA2, WPA2 + WPA3 or just WPA3 depending on your requirements and environment.
  
  Whichever option you select, make sure to select 802.1X methods in the Auth Key Mgmt (AKM) area.
5. In the Security > AAA tab, in the Authentication List field, select the authentication method list that you created earlier. Then, click on the Apply to Device button.
Create a policy profile:
1. In the left-hand side menu, select the following option: Configuration > Tags & Profiles > Policy.
2. In the right-hand side pane, click on the + Add button.
3. In the Add Policy Profile window, in the General tab, enter the display Name and set the Status switch to Enabled.
4. In the Access Policies tab, in the VLAN field, enter or select the VLAN that you want clients on this WLAN to be assigned to.
5. Optional: In the Advanced tab, set the Allow AAA Override switch to Enabled, and in the Accounting List field, select the accounting method list that you created earlier.
  
  Note:
  Enabling Allow AAA Override is required if you want RADIUS-assigned attributes, such as a dynamic VLAN, to take effect for individual users. If you skipped creating the Authorization method list in an earlier step, this setting has no effect, and all clients will use the static VLAN configured above.
6. Click on the Apply to Device button to save the policy profile.
Create a policy tag and map the WLAN to the policy profile:
1. In the left-hand side menu, select the following option: Configuration > Tags & Profiles > Tags.
2. In the right-hand side pane, in the Policy tab, click on the + Add button.
3. In the Add Policy Tag window, enter the display Name for the tag.
4. In the WLAN-POLICY Maps area, click on the + Add button, then in the WLAN Profile field, select the WLAN that you created earlier, and in the Policy Profile field, select the policy profile that you created earlier. Click on the ✓ button to add the mapping, then click on the Apply to Device button to save the policy tag.
Assign the policy tag to the AP:
1. In the left-hand side menu, select the following option: Configuration > Wireless > Access Points.
2. In the right-hand side pane, click on the joined access point that you want to assign the policy tag to.
3. In the Edit AP window, in the General tab, in the Tags area, in the Policy field, select the policy tag that you created earlier.
4. Click on the Update & Apply to Device button.
  
  Note:
  The access point will briefly disjoin and rejoin the controller to apply the new tag. This is expected behavior.

Cisco 9800 RadSec

This section contains an example configuration for the Cisco Catalyst 9800 Wireless Controllers and Portnox Cloud RADIUS servers using secure RADIUS (RadSec) connections.

Turn on RadSec connections for your Cloud RADIUS server(s).
1. Open your Portnox Cloud tenant in a web browser.
2. Go to Settings > Services > CLOUD RADIUS SERVICE > Cloud RADIUS instance and select the Cloud RADIUS server that you want to connect to using RadSec. Then, click on the ⋮ > Edit link.
3. Activate the Enable RADIUS over TLS (RadSec) checkbox.
4. Copy the following information and store it, for example, in a text file. You will need this information later on in the configuration process:
  - Cloud RADIUS IP
  - Authentication port
  - Accounting port
5. Click on the Save button to save your changes.
Download the Portnox Cloud RADIUS trust chain certificates from DigiCert.
1. Download the DigiCert Trusted Root G4 certificate in PEM format.
2. Download the DigiCert Trusted G4 TLS RSA SHA384 2020 CA1 intermediate certificate in PEM format.
3. Merge the certificates into a single PEM file.
  The file must have this structure:
```
-----BEGIN CERTIFICATE-----
(DigiCert G4 TLS CA1 Intermediate CA certificate)
-----END CERTIFICATE-----
                                    
-----BEGIN CERTIFICATE-----
(DigiCert G4 Root CA certificate)
-----END CERTIFICATE-----
```
4. Upload the certificate chain file into the Trustpool.
  
  Navigate to: Configuration > Security > PKI > Trustpoints > Add, then select type as CA Certificate and upload the file.
Generate a WLC device certificate.

Follow the official Cisco documentation to generate this certificate on WLC.

Note:
The Cisco 9800 WLC requires a device certificate, even if Portnox Cloud is configured for one-way TLS, not mTLS. Cisco’s PKI system enforces this. RadSec will not work unless the WLC has a valid device certificate installed. Portnox Cloud supports optional mTLS and if mTLS is enabled, the WLC sends its device certificate to Cloud. If mTLS is not enabled, Cloud ignores the certificate, but Cisco still requires a valid certificate and a complete certificate chain on the WLC.
1. Navigate to: Configuration > Security > PKI > Trustpoints.
2. Click on Add to create a new Trustpoint for the NAS device certificate.
3. Generate a CSR using the WLC interface.
4. Submit the CSR to your Certificate Authority.
5. When your CA returns the signed device certificate, merge certificates into a single PEM file.
  This file must contain the device certificate (issued from CSR), the intermediate CA certificate (from your CA), and the root CA certificate (from your CA). It must have this structure:
```
-----BEGIN CERTIFICATE-----
(Device certificate)
-----END CERTIFICATE-----
                                    
-----BEGIN CERTIFICATE-----
(Intermediate CA certificate)
-----END CERTIFICATE-----
                                    
-----BEGIN CERTIFICATE-----
(Root CA certificate)
-----END CERTIFICATE-----
```
6. Upload this certificate chain file.
Configure the RADIUS server on WLC:
1. Navigate to Configuration > Security > AAA > RADIUS > Servers and Add a new server, naming it, for example, AAA RADIUS Server.
2. In the Server Address field, paste the Cloud RADIUS IP value obtained earlier from Portnox Cloud.
3. In the Authentication Port field, paste the Authentication Port value obtained earlier from Portnox Cloud.
4. In the Accounting Port field, paste the Accounting Port value obtained earlier from Portnox Cloud.
5. In the Shared Secret field, type: radsec.
  
  Note:
  Do not paste the Shared Secret from Portnox Cloud.
6. Click on the RadSec tab.
7. In the RadSec Type field, select the TLS option.
8. In the Port field, paste the Authentication Port value obtained earlier from Portnox Cloud.
9. In the Trustpoint Client field, select the Trustpoint that you created for WLC.
10. In the Trustpoint Server field, select the Trustpoint that you created for Cloud RADIUS.
11. In the Hostname field, enter the hostname of the Portnox Cloud RADIUS server.
  
  To find the FQDN for your Cloud RADIUS IP, see the following topic: What are the fully qualified domain names (FQDNs) of Cloud RADIUS servers.
12. Click on the Update & Apply to Device button.