Having issues with this one. We have the RD Gateway setup (server 2012) and have not had issues with users connecting, except one. She's using it with the client on Windows 7 and 8 systems. If she pings our gateway name, it resolves to the correct IP. If she goes to it via web, she does not get the IIS 8 default page, it times out.
However, she took her laptop to another location, same ISP, and it works fine. She can connect to our OWA server with no issues.