RUT950 – Terminal cannot connect to charger fixed IP (connection refused)

Ev Charging
1

Hello,

I am installing an EV charger that uses a Teltonika RUT950 router (WAN via Ethernet).

The payment terminal is connected to a dedicated terminal port of the charger network behind the router.

The charger requires the terminal to connect to a fixed local address:
192.168.111.50

Problem:
When the terminal connects to this address it always shows “connection refused” and cannot complete initialization.

What I verified:

Ethernet WAN is working

Router WebUI accessible

If I connect a laptop to the same terminal port, internet works normally

Terminal is visible in the router LAN client list with correct MAC

Hardware and cables seem OK

Charger backend shows no obvious error

I also tested DHCP.
The terminal can obtain an IP, but the charger only accepts communication via 192.168.111.50, so initialization still fails.

Router log repeatedly shows:
“Mobile network rejection was recently detected”
(LTE SIM is inserted but Ethernet WAN is primary)

My suspicion:
The router may be blocking or resetting traffic frome IP 192.168.111.50.

Could firewall/NAT/failover behavior in the RUT950 prevent communication to a fixed local device inside the LAN?

Any recommended settings or tests would be appreciated.

Thank you.

2

Hello,

Could you specify what EVC station model you use? If you are using not Teltonika EVC, I would recommend to change post category from “Ev Charging” to the “Networking solutions” as they are more focuses on working with the device networking and may miss post in this category.

Dominic

3

Okay. Thanks for the Infomation. The EVC is From Enercharge and now should be Keba.