We are currently configuring a Teltonika RUT956 router for a mobile camera setup. We have inserted a SIM card with a Public static IP and configured the APN settings as provided by the ISP.
Our objective is to NAT our laptop and access it via RDP (Remote Desktop). we have used an SNAT on this, but we are still unable to access the laptop remotely.
Could you please review and advise if any additional configuration is required on the router to enable RDP access?
Could you please confirm whether the computer you are trying to access remotely is connected to a router with a static public IP address?
If so, you would need to set up a port forwarding rule on the router. Please correct me if I am mistaken, but it appears that your intended setup is as follows:
Your device → Public IP + Port → Router → Remote Desktop
I appreciate your clarification and look forward to your response.
Yes, you are correct regarding the setup. I will proceed with configuring the port forwarding on the router and set it up accordingly. I will update you shortly once it is completed.
I have completed the port forwarding for RDP, and it is now working fine. Thank you for your support.
I have another query regarding a RUT956 4G router. I am using a 5G SIM with a public IP, and while the router is receiving the public IP, there is no internet. However, when I try the same SIM with a TRB500 router (which supports 5G), the internet works fine.
Could you please advise on why this is happening and how we can resolve it?
This behavior can occur because the RUT956 is an LTE (4G) router , while the TRB500 is a 5G device , and some operators configure 5G SIM profiles differently.
If the router receives a public IP but there is no internet connectivity, the most common causes are:
APN / PDP type mismatch – Some 5G SIM profiles default to IPv6 or IPv4v6. The RUT956 may work more reliably if the PDP type is set to IPv4 only .
Please try setting the APN manually and change PDP Type to IPv4 under Network → WAN and edit the mobile interface to change the PDP type. .
Routing priority – Ensure the mobile interface is the primary WAN and that no other interface has a lower gateway metric.
Operator provisioning differences – In some cases, 5G SIM profiles are optimized for 5G devices, so it may help to confirm with your operator whether a specific APN or IPv4 configuration is required for LTE routers.
You can also test connectivity directly from the router (e.g., pinging 8.8.8.8) to confirm whether the router itself has internet access.
I have changed the PDP Type to IPv4 in the WAN settings. Now I am able to ping 8.8.8.8 from my laptop while connected to the router, but I still do not have internet access.
I have one update. Currently, I am using the TRB500 router with a 5G SIM. I just noticed that the internet is not working on this router as well. Let us first try to resolve the issue with this router, and then we can move on to the RUT956 4G model. I have done the above changes in the TRB500 only.
Since the device can successfully ping external IP addresses (e.g., 8.8.8.8), it indicates that the mobile connection itself is active and that basic IP routing is working. However, this alone does not confirm whether DNS resolution is functioning correctly, so your assumption about a potential DNS issue is a reasonable starting point.
To narrow this down, it would be useful to check whether the device can resolve hostnames. For example, testing ping google.com or nslookup google.com would confirm if DNS resolution is working properly. If hostname resolution fails while pinging IP addresses still works, then the issue is very likely related to DNS configuration.
If DNS resolution works correctly, the problem may instead be related to other configuration. In similar cases with cellular routers, browsing issues despite successful ping responses are sometimes caused by factors such as incorrect MTU values, firewall rules affecting HTTP/HTTPS traffic, or APN settings that do not fully match the mobile operator’s requirements.
Could you please confirm:
Whether hostname resolution works (e.g., ping google.com or nslookup google.com )
What DNS servers are currently configured
The APN settings being used on the device
This information should help clarify whether the issue is DNS-related or if it stems from another part of device configuration.