Hi i attached PDF file herewith how to solve Tunneling error please go throuh
this pdf and solve it your tunneling error.
thanks for your document.
To me it's too complicated, I have sent it to network department :) .
In any case I have understood that the problem is due to ports and permissions.
Unfortunately my company doesn't open the port 80 for security and the port 4747 is already open.
So now we are checking the different user permissions of the links (using your schema).
My current workaround is that the user has to connect by VPN to our production environment.
In this case everything seems work right.
I'll keep you informed, but I work in a big company and the checks take a lot of time