How to fix RFC1918 filter error

If you are using a SIM card with an IP address within 100.x.x.x subnet, Teltonika devices will consider it as being a public IP and you might get the error below when trying to remotely access the router:

In order to fix this error, please follow the steps below:

Teltonika RUTOS7 Firmware

1. Log in to the router's web interface (WebUI)
2. Go to System -> Administration -> Access Control
3. Under WebUI section, turn off 'Ignore public IPs on public interface':

      4. Scroll down and click on 'Save & Apply'

      5. Now you should be able to access the device remotely

Teltonika Legacy Firmware

1. Log in to the router's web interface (WebUI)
2. Go to System -> Administration -> Access Control
3. Under WebUI section, untick 'RFC1918 Filter':

      4. Scroll down and click on 'Save'

      5. Now you should be able to access the device remotely.