Common Support Tips


WLAN client with Intel® "802.11ac" WLAN module cannot connect to a LANCOM LX-640x & LANCOM LW-600 with an 802.11ax SSID

With WLAN clients that use an Intel® "802.11ac" WLAN module, an incompatibility of the Intel® driver used may prevent an SSID broadcast in the 802.11ax standard from being "seen" (see article on Intel-Webseite).


As a result, the WLAN client cannot connect to the SSID. The recommended troubleshooting procedure is described inthis knowledge base article.

As of the operating system version macOS Catalina 10.15.4, a note appears regarding a kernel extension from "NCP engineering GmbH". This kernel extension is necessary for the correct operation of the Advanced VPN Client on macOS.


We do not recommend a future update to the following operating system macOS 10.16 (expected to be available in autumn / winter 2020) until LANCOM Systems provides a new version of the Advanced VPN Client macOS, compatible with macOS 10.16.

The LANCOM Advanced VPN Client can be used in full for an initial installation for 30 days in unlicensed trial version mode. After these 30 days, the product must be activated with a corresponding license for further, unlimited use. You can obtain the licenses from specialist retailers or distributors.


A LANCOM router accepts a maximum of three simultaneous VPN connections from LANCOM Advanced VPN Clients, which are in 30-day trial version mode. All other connection requests from VPN clients that are in this mode are rejected by the router.


Procedure if a device is not available in the LMC

If one of your devices being managed by the LANCOM Management Cloud (LMC) is shown as “offline”, but is otherwise working normally, communication with the LMC may be disrupted.


You can find a detailed description for troubleshooting in our Troubleshooting Guide: How to proceed when a device cannot be reached in the LMC.

LANCOM Systems now offers the Support Knowledge Base in a new design and with improved functions.


The users of the LANCOM Support Portal also benefit from the fact that thematically suitable Knowledge Base articles are already offered as a solution when creating a support request.


Open the LANCOM Support Knowledge Base


Securing the VoIP feature in LANCOM routers against attacks from the WAN

Network components such as routers, which can be reached directly over the Internet (WAN), are under attack on a daily basis. LANCOM routers are no exception.


Attempts will be made to access the configuration of the device, or to monitor or manipulate the communications between the device and others connected to it. Similarly, there are attacks on the VoIP functionality in the router.


Attackers from the Internet attempt to initiate phone calls. These are often foreign connections or special services, which can lead to considerable expense to the operator of the router.


If telephony on a LANCOM router is set up using the Setup Wizard, the necessary settings are automatically put in place to protect against such attacks.


When configuring the VoIP functionality manually, please take into account the configuration steps described in the Knowledge Base document Securing the VoIP feature in LANCOM routers against attacks from the WAN.


Helpful Knowledge Base documents and How-To Videos regarding LANCOM R&S®Unified Firewalls

The following master document contains a listing of Knowledge Base documents which can help with the configuration and management of LANCOM R&S®Unified Firewalls.


The document also contains links to the following How-To Videos:

Access to the LANCOM R&S®Unified Firewalls

Upgrade of a LANCOM R&S®Unified Firewall from v9 to v10