Mac Authentication For Cisco

MAC-Based Access Control is one method for preventing unauthorized access to the Wireless LAN. This article discusses how MAC-Based Access Control works and provides step-by-step configuration instructions for Microsoft NPS and Dashboard.

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  2. Mac Authentication For Cisco Webex
  3. Cisco Mac Address

This video is an overview of MAC Authentication Bypass. MAB is useful as a method of fallback for bypassing 802.1x authentication when you have an endpoint with no supplicant software installed. 6) On the Configure Authentication Methods page, uncheck all options except Unencrypted authentication (PAP, SPAP). (Figure 6) Figure 6. 7) Click Next on the Configure Constraints screen. 8) Click Next on the Configure Settings screen. 9) Review settings and click Finish on the Completing New Network Policy screen. (Figure 7) Figure 7. The video introduces you to a concept of MAC Authentication Bypass (MAB) in Cisco ISE 2.2. We will used MAB to authenticate the network devices that we profiled in the last video. You will learn about Logical Device profile, and the basic structure of authentication and authorization policies. For devices that cannot be profile, we will statically map the device to an Endpoint Identity Group.

MAC-Based Access Control

It is critical to control which devices can access the wireless LAN. MAC-Based Access Control can be used to provide port based network access control on MR series access points. With MAC-Based Access Control, devices must be authenticated by a RADIUS server before network access is granted on an SSID. The AP (RADIUS client) sends a RADIUS Access-Request to the RADIUS server containing the username and password of the connecting wireless device. The username and password combination is always the MAC address of the connecting device, lower case without delimiting characters. If a RADIUS policy exists on the server that specifies the device should be granted access and the credentials are correct, the RADIUS server will respond with an Access-Accept message. Upon receiving this message, the AP will grant network access to the device on the SSID. If the RADIUS server replies with an Access-Reject because the device does not match a policy, the AP will not grant network access. Below is a diagram showing a successful authentication.

MAC-Based Access Control has some security implications which must be considered. One is that it is not an association method that supports wireless encryption. Therefore clients will need to rely on upper layer protocols for encrypting traffic such as SSL or IPsec once a device has gained network access. The second being the credentials used. Because the MAC address of the device is used as the credentials, an attacker can easily gain network access by spoofing the MAC address of previously authenticated clients. Below are the steps necessary in order, to deploy MAC-Based Access Control using Microsoft NPS.

MAC-Based Access Control

It is critical to control which devices can access the Wireless LAN. MAC-Based Access Control can be used to provide network access control on MR series access points. With MAC-Based Access Control, devices must be authenticated by a RADIUS server before network access is granted on an SSID.

The Access Point (Authenticator) sends a RADIUS Access-Request to the RADIUS server containing the username and password of the connecting wireless device based on the association process. With MAC-based Access Control, the username and password combination is always the MAC address of the connecting device, lower case, without delimiting characters. Cs5 for mac os 10.13.

Authentication

If a RADIUS policy exists on the server that specifies the device should be granted access and the credentials are correct, the RADIUS server will respond with an Access-Accept message. Upon receiving this message, the AP will grant network access to the device on the SSID.

Mac Authentication For Cisco

If the RADIUS server replies with an Access-Reject, the device does not match an existing policy or the RADIUS server has a rule denying the client and the AP will not grant network access to the device.

Below is a diagram showing a successful authentication exchange:

Mac Address Authentication Cisco Switch

Security Considerations

Mac Authentication For Cisco Webex

MAC-Based Access Control has some security implications which must be considered before using this method as a primary method to secure a wireless network.

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  • It is not an association method that supports wireless encryption. Communication between wireless clients and the MR is not encrypted and can be intercepted and viewed as clear text by “man-in-the-middle” devices using easily accessible wireless capture tools. Therefore clients will need to rely on upper layer protocols for encrypting traffic, such as SSL or IPsec, once a device has gained network access.
  • Because the MAC address of the device is used as the authentication credentials, an attacker can easily gain network access by spoofing the MAC address of previously authenticated clients.