RUT240 Technical Support

Teltonika policy for technical support is to contact your supplier directly for technical support.  Teltonika do not provide technical support directly to end users and will refer you back to your product supplier.

We will provide the most common technical support queries and configurations on this dedicated product site to get you up and running and answer the most common technical support questions.

One of the most common questions relating to the Teltonika RUT240 4G router is regarding port forwarding.  And the most common answer is that the router is being used with a standard 4G data SIM card and therefore cannot be accessed directly from the Internet which means that the port forwarding rules cannot work.

In order to be able to access your Teltonika RUT240 4G router you will need to use a Fixed IP SIM Card and ensure that you configure the APN settings so that the router connects to the APN for your chosen Fixed IP SIM provider.  Once you can remotely access your router then port forwarding rules will work without issue.

Once the user can remotely access the RUT240 router and finds that port forwarding still does not work, the most common reason for this is that the device on the LAN has the IP address details misconfigured, usually missing the default gateway which should be the LAN IP address of the router.  For example, if your device on the LAN is a CCTV camera NVR then it may be configured with an IP address of, a subnet of and a default gateway of (this assumes that your RUT240 router has the LAN IP address of

If you miss the default gateway from the NVR settings, you will still be able to access the NVR on the LAN, but port forwarding will not work until you correctly configure the default gateway so the NVR knows the router out to the Internet so can respond to inbound requests through the port forwarding.