Under gateway we understand primarly the device that sends the infread codes. Click on the plus button in the setup programm on the tab „Gateways“. Choose the type of your gateway device (for expample Harmony Hub).
Now you can select in the choice, which you reach by pressing the search button your infrared device. If the device can’t be found automatically, probably the broadcasting service on you router is disabled. In this case you have to enter the mac address or ip address (if your infrared device has a fix ip address) manualy. Now you have to define a unique id for your gateway, which you will use again for register your devices.
After registering a gateway and you can configure your devices.