The Sub Application 1 (ApplicationName.exe) is downloaded to the Download Cache (part of GAC) and launched on the desktop. The browser can be closed thereafter. In the First Screen on click of a button, there is a call to Sub Application 2 (Web Service) for server side processing (business logic and data logic). On the intranet the entire application works fine.
But on the internet it fails. Details are:
- The Server hosting the Applications has a Real IP.
- The Client accesses the Server through a dial up.
The Sub Application 1 (URL) is granted Trust in the Security Permissions as part of the Client .NET Configuration (made as a Trusted Assembly). The First Screen is displayed. On click of a button, the call to the Web Service fails with the Exception:
"System.Net.WebException: The underlying connection was closed: Unable to connect to the remote server."
Articles on the Web attribute this problem to Proxy, DNS, Firewall etc. But we haven't found a solution.