Description:

If an access point is installed in a publicly accessible area (e.g. at a school or hotel), we recommend that you use RADIUS authentication to ensure that a client (e.g. a notebook PC) is unable to gain access to the management network even if it is connected by cable to the Ethernet socket that is intended for use by the access point.

This article describes how RADIUS authentication is set up for an access point with LCOS LX so that only this has access to the management network.

Access points that are operated in a WLAN-Controller scenario must each be configured individually. A central configuration of the steps described here via a WLAN-Controller is not possible.

This scenario can also be implemented with LCOS access points.



Requirements:


Scenario:


Procedure:

1) Configuring the RADIUS server on the LANCOM router:

1.1) In LANconfig, open the configuration for the router, navigate to the menu RADIUS → Server and set a checkmark next to RADIUS authentication active.

1.2) Navigate to the menu RADIUS services ports.

1.3) Check that the authentication port is set to 1812.

1.4) Go to the menu IPv4 clients.

1.5) Create a new entry and enter the following parameters:

1.6) Go to the menu User table.

1.7) Create a new entry and adjust the following parameters:

As of SWOS 4.00 RU2 the switch sends RADIUS requests with the Service type Call check. In this case the Service type in this menu als has to be set to Call check. As an alternative the option Any can also be selected.

As of LCOS SX 4.00 RU5 the Service type Framed is used for RADIUS requests and the Service type Call-Check is used for MAC-based requests. In this case the Service type has to be set to Framed. As an alternative the option Any can also be selected.

The Service type Call check is supported as of LCOS 10.30.

1.8) This concludes the configuration of the RADIUS server on the LANCOM router. You can now write the configuration back to the device.



2) Configuring the RADIUS authenticator on the GS-3xxx switch:

2.1) Open the webinterface of the device, switch to the menu Security → RADIUS → Configuration and click Add New Server.

2.2) Modify the following parameters in the Server Configuration and click Apply:

2.3) Go to the menu Security → 802.1X → Configuration and activate the 802.1X authentication by setting the slider Mode to on.

2.4) In the Port Configuration select the Admin State Port-based 802.1X in the dropdown menu for the port that the access point will be connected to. Click Apply afterwards.

With the option Port-based 802.1X, solely the access point should be able to authenticate itself. All other end devices connected via WLAN can communicate via the switch port without authentication. For this reason it is important to provide the WLAN end devices with their own network that is separated from the management network by VLAN. You can use this Knowledge Base article to help you here.


2.5) Click the red disk symbol on the upper right side to save the configuration as Start configuration

The Start configuration is boot persistent and is therefore available even after a restart or a power failure.

2.6) This concludes the configuration of the switch.



3) Configuring the RADIUS supplicant on the access point:

3.1) Configuring the RADIUS supplicant via LANconfig:

3.1.1) Open the configuration for the access point in LANconfig and switch to the menu item Management → 802.1X-supplicant → Configure 802.1X supplicant.

3.1.2) Edit the entry INTRANET.

3.1.3) Modify the following parameters:

3.1.4) The configuration of the access point via LANconfig is now complete. You can now write the configuration back to the device.


3.2) Configuring the RADIUS supplicant via WEBconfig:

3.2.1) Connect to the access point via WEBconfig and switch to the menu System configuration → Adjust the network settings of this device.

3.2.2) For the 802.1X supplicant, adjust the following parameters and then click on Confirm:

3.2.3) The configuration of the access point is now complete.