After connecting it to my home router, I’m getting no internet access on the home router itself or on any devices connected to it.
If I configure a custom DNS (e.g., 8.8.8.8) on my home router, then the connected devices do get internet access — but the home router still doesn’t. It looks like the Teltonika router is providing a DNS server to my home router that’s identical to the gateway address, which might be causing the issue.
When I switch the Teltonika router to bridge mode, everything works fine.
Passthrough mode
In this mode the router shares the IP address assigned by the operator with a single LAN clients. Great option in cases where the router needs to have internet access itself (for example RMS, ping reboot, monitoring, etc.).
I don’t believe it’s necessary for you to set up passthrough or bridge modes, as connecting end devices to the LAN ports of the Teltonika device should already provide internet.
Make sure that WAN failover is turned off and mobile is set as main WAN in the Network → WAN page.
Set the Mob1s1a1 interface as primary.
Make sure that DHCP server is enabled on menu Network → LAN.
Then in the Network → WAN → Interfaces:MOB1S1A1 page select Mode: Passthrough in the mobile configuration section. You will then see an additional configuration field for entering a MAC address appear. Enter your PC network interface MAC address, use colons to separate digit groups. In windows you can find your interface’s MAC address by typing this command in CMD: getmac /v /fo list
Set your PC to obtain IP address automatically. Go to the Ethernet Settings → Change adapter options → Ethernet NIC properties → Internet Protocol Version 4 (TCP/IPv4) → Obtain an IP address automatically.
Reboot RUT device.
PC whose MAC address was set in Passthrough settings, should get routers WAN IP address. All other devices connected to LAN port, will get LAN pool IP address and should be able to access internet too.
Please try to reproduce these steps and let me know how it goes.
In case I configure it the way you described, everything works - ip is passed to windows computer. If I change mac address to home router mac, router and clients connected to home router have no internet access. If i then manually override dns server from provided one from teltonika router, to 8.8.8.8, clients get internet access. It looks like teltonika router passes wrong dns server to home router?
In IP passthrough, routers use DHCP to pass the IP address and DNS server that has been assigned by the ISP to the downstream device. The RUT950 is correctly passing your public IP to the home router, but it’s also passing DNS server information via DHCP.
The problem is that when your home router receives DNS settings from the RUT950’s DHCP, those DNS servers may be the Teltonika’s internal addresses (like 192.168.1.1), which become unreachable in passthrough configuration. Your downstream clients then can’t resolve domain names.
Therefore, you can either override the DNS server in your home router settings (that resolved the issue) or you can try changing the DHCP settings in RUT950 (set to option 6)
I have an older RUT950 device that cannot be upgraded to firmware version 7. Is it possible to configure the same settings using version 6 firmware? If the option is not available in the GUI, that’s not a problem—I can configure it via SSH. Could you please tell me where I can find the relevant configuration details?
The relevant settings can be accessed through the WebUI. For detailed instructions, please refer to the following article:
Alternatively, you can set the DNS server directly on your router—for example, to 8.8.8.8 (Google DNS). This will allow devices connected to your home network to resolve hostnames through the specified DNS server.