Hello Jörg,
Thanks for contacting TELTONIKA | Crowd-support forum.
In order to access from remote networks (WAN) to the device WebUI, it’s necessary to enable remote HTTP or HTTPS on the device, go to SYSTEM >ADMINISTRATION > Access Control and then turn on remote HTTP or HTTPS access. Please note that you will need IP public to manage remote access.
Check the link below for more detail.
https://wiki.teltonika-networks.com/view/RUT950_Administration#Access_Control
If you are looking for access to the device WebUI from LAN using Ethernet cable or Wireless, make sure that your Terminal device get IP address from the DHCP, open a Command Prompt window and type ipconfig then check if you are able to get IP address from LAN network.
After receiving IP address, you can enter the router’s Web interface by typing the IP address of DEFAULT GATEWAY into the URL field of your web browser.
Should you need any additional information please let us know.
Best Regards,