Hello,
Thank you for contacting us.
To better understand your case, it would be helpful, if you could provide a drawing of your topology. A description with IP addresses could be useful as well.
I would also like you to attach a troubleshoot file to your question from the router that you use. Please, replicate your configuration, then access router's WebUI, go to System -> Administration -> Troubleshoot section and download troubleshoot file from there. The logs in the file might provide more insight into the issue.
Best regards,
