The Universal Firmware Update feature is relevant for IGEL OS 11 devices and earlier, not for IGEL OS 12 devices.

The UMS initiates a TCP connection to port 443 at The IGEL download server will send an answer containing a list of download links that enable the UMS to download the desired firmware.

Direct Connection

The following figure illustrates the communication between the UMS server and the IGEL download servers:

Via Proxy

When a proxy is positioned between the UMS and the IGEL download servers, the port on which the proxy is listening must be specified under UMS Administration > Global Configuration > Proxy Server.