RDP into a terminal server with RDWEB app access?

I have a terminal server using server 2012 as a Remote Destop server.

I know I can access http://servername/rdweb if I have a VPN to the network, or use a subdomain with a certificate.  

What I would like to know is how to have rdweb app access directly from an offsite RDP connection? My site is setup to access the RD server through 3389....
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Cliff GaliherCommented:
The secure and correct way to do this is to set up an rdgateway server. When done properly, rdweb will be aware of the rdgateway and serve up rdp files with the appropriate settings
savethehumansAuthor Commented:
So how is that done with an offsite hosted website?
savethehumansAuthor Commented:
Anyway its done, the rdgateway has to be accessed from a browser?
Cliff GaliherCommented:
No. Completely different components. Rdweb is a website and as such, must be accessed hrouh a browser. Rdgateway can be used by any rdp app that supports rdgateway protocol extensions. Two separate, yet complementary services.

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