Cannot access NAS with Reverse Proxy server via Tunnel

Hi all,

I can set Tunnel and it work on my NAS at home.
When I apply this to the company, also using NAS. I faced a problem.
My NAS at the company work as a Reverse Proxy server. When I setup Tunnel, I can access my printer IP, but I cannot access my NAS.
Anybody faced this and how to solve it?
Thank you very much.
Hoc Nguyen