sauermann LoRa TrackLog Guide De Démarrage Rapide page 4

Step 3
The screen with the current gateway's configuration is displayed.
Click on "Setup".
Step 4
"Network interfaces" is displayed.
Click on the pen allowing to modify the DHCP Client configuration.
Step 5
The screen with the DHCP configuration details is displayed.
Click on the box "Mode" in the menu "IPv4 settings".