Hello,
Thank you for reaching out!
As I understand, Web Server is just port forwarding for multiple ports.
To set this up on a Teltonika device, navigate to Network → Firewall → Port Forwards. Create a new rule with the external port specified as 4100-4105 and the internal IP address of your server. The internal port should be the same as the external.
When the advanced configuration window opens up, change the protocol to TCP and press Save & Apply. The router might need to be rebooted for the rules to apply.
Let me know if this helped.
Best regards,
DaumantasG