RUTX50 has no internet - ethernet wan not working


I’ve encountered an issue with my RUTW50 router with ethernet wan :

1 - The WAN section appears to be functioning correctly, with the ETH LED on.

2 - However, the LEDs on the connected wired cables are flashing green slowly and randomly, not orange.

3 - The router doesn’t have a SIM card, so the 3G, 4G, and 5G LEDs are flashing.

Despite these indicators, I’m unable to establish an internet connection through the router.
When I connect my computer directly to my ISP router via Ethernet, it works. But when I connect my ISP router’s Ethernet cable to the WAN port on the router and another cable from the LAN port to my computer, I have connectivity issues.
IP and DNS are obtained automatically on my computer I have no static IP or static DNS adresses. My ISP gives out an IP address to all new hosts connected. When I navigate to Network → Interfaces → General, and check if there is an IP lease on the wan interface, there is one.

Here are the steps I’ve taken:

1 - Factory reset the RUTX50 to default settings, assuming it should work out of the box.

2 - Upgraded the router to the latest firmware (RUTX_R_00.07.04.5_WEBUI) without retaining previous settings.

3 - After firmware upgrade (or reset to default settings) did not change router’s LAN IP address, wired WAN is enabled by default on DHCP mode.

Despite these efforts, the problem persists. If anyone knows the cause or a solution, please help. Unfortunately, I can’t attach a troubleshoot file of the RUTX50 as a new user.

Thank you in advance.


That is the intended behavior - yellow LEDs indicate 100Base-T connection, while green indicates 1000Base-T connection:

Could it be that the ISP only gives out an IP address to the known hosts? Please plug the Ethernet cable from the ISP modem to the WAN port of the RUTX50, then navigate to Network → Interfaces → General, and check if there is an IP lease on the wan interface.
If the lease is there, please navigate to System → Administration → Troubleshoot, and in the Diagnostics section run a ping test to Post the results below.
Finally, run the same ping test from your PC once it’s connected to the RUTX50 LAN port.
If the pings are still lost, please post a screenshot of the Interfaces page, with the MAC addresses blurred, as well as public IP addresses if any are present (leave the private ones visible).

Best regards,


Thank you for the quick response.
I’d like to bring to your attention that my ISP assigns IP addresses automatically to all new users, and the RUTX50 currently has an active IP address.

As requested, here’s a screenshot of the Interfaces page with all MAC addresses and public IP addresses removed, I cannot upload screenshot as I’m a new user, please find link here:

Additionally, here’s the ping test you requested, I cannot upload screenshot as I’m a new user, please find link here:

Interestingly, there are no lost pings in the test results. However, despite this, I’m still unable to establish an internet connection.

Your assistance in resolving this matter would be greatly appreciated.

Thank you in advance,


The issue could be caused by an IP conflict, as your WAN and LAN shares the same subnet - There are a few possible solutions:

  • Put your ISP modem into Bridge mode
    This will provide the WAN IP of the modem directly to the RUTX50. However, not all modems support this configuration. Instructions on how to configure it should be located in the manual of the ISP-provided modem. This will also mitigate the issue of double-NAT’ing, and could also potentially increase internet speeds and decrease latency. Port forwarding will also be easier to configure if this is a feature of interest to you.

  • Change the subnet of the RUTX50 LAN
    In the interfaces page, edit the LAN by pressing the pencil icon, and change the IP to any other IP in the private IP range (e.g. Don’t forget to also edit the DHCP server IP assignment range.

Best regards,


Thank you for the quick response.

Problem solved!

I successfully changed the RUTX50 LAN subnet (to, and now I have internet connectivity through my ISP modem, connected to the WAN Ethernet port on my Teltonika RUTX50.

I also attempted the second solution by putting my ISP modem in Bridge mode, but unfortunately, it didn’t establish an internet connection. This issue is unrelated to Teltonika. My ISP’s equipment is of low quality and reliability; the fact that it even has a Bridge mode is surprising. I won’t pursue this matter further.

Nevertheless, I appreciate the information that Bridge mode can potentially improve speed. Thank you for your assistance.

Thanks again for your prompt help.

Best regards,

1 Like


I’d like to revisit this topic because I’m eager to maximize the RUTX50’s functionality and make the most of its capabilities, :slight_smile: .
I’m keen to utilize it to its fullest extent and learn from you.

I put my ISP-provided modem into bridge mode, with the WAN IP directly connected to the RUTX50. Here are the steps I took:

  1. Factory reset the RUTX50 to default settings, assuming it would work out of the box.
  2. Conducted a ping test by navigating to System → Administration → Troubleshoot. The ping test to showed all packets received, as seen in this screenshot:

However, I still have no internet connection, which is puzzling.

I visited Network → Interfaces → General and took a screenshot with MAC addresses removed and public IP addresses partially removed, but private ones visible. You can see it here:

Considering the possibility of an IP conflict (although my WAN and LAN have different subnets), I changed the RUTX50 LAN subnet. In the interfaces page, I edited the LAN by clicking the pencil icon and assigned a different IP (

Despite these efforts, the issue persists. Your assistance in resolving this matter would be greatly appreciated.

Thank you in advance,


In this case, it seems like the issue could be with the DNS servers assigned by your ISP (or lack thereof). Please edit the LAN interface, and under the custom DNS servers, add the following:

  • (Cloudflare IPv4)

  • (Google IPv4)

  • 2606:4700:4700::1111 (Cloudflare IPv6)

  • 2001:4860:4860::8888 (Google IPv6)

Let me know if this helps!

Best regards,

Hi Daumantas,

Great news! By adding the custom DNS servers to the RUTX50, it resolved the initial internet access issue with my ISP modem in router mode, without needing to change the LAN IP to

However, the second internet access problem persists with the RUTX50 and my ISP modem in bridge mode, even after applying the custom DNS servers.

I’ve compiled all the relevant screenshots into one document, to make it easier for you to adress the issue. (Also because as a new user, I can only upload one image/post.)

Order of all screenshots below:

  1. Interfaces
  2. Custom DNS servers
  3. Ping test
  4. ISP-modem in Bridge mode interface

Thank you immensely for your assistance with this matter.

Best regards,


Perhaps you could perform the same ping test on a LAN device?
Everything looks to be configured correctly on the RUTX50. Are your LAN clients receiving IP addresses from the RUTX50? What errors are being shown when trying to load up a webpage on Google Chrome?

Best regards,

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