Hello,
Could you start by sharing the VPN type you have used in your setup?
A topology of your network would be helpful too.
Lastly, if possible, attach a troubleshoot file to review your configuration details by editing your question. To generate the file, access router's WebUI, go to System -> Administration -> Troubleshoot section and download troubleshoot file from there. It can help to provide necessary adjustments
Attached files are private and visible only to Teltonika Moderators.
Best regards,