I am working on a project for Surface RT/RT2 and Surface Pro2. In my recent work, I found that UpgradeToSslAsync is too slow on Win8/Win8.1 on the devices. When I connect one of our company’s website with its FQDN (it is accessible from both intranet and Internet) within our intranet without any DNS/proxy configured, the issue occurs with a high probability.
Given this website is xxx.a.com with https. If I access it from IE, it is about 20~40 seconds to succeed. However, my program will take about 150 seconds to succeed.
My program follows StreamSocket.UpgradeToSslAsync to make the connection. There are two steps: a) make a plain connection to xxx.a.com with https; After it succeeds, b) upgrade the connection to SSL.
Step a) is very fast, but the issue occurred at step b). It will wait more than 145 seconds before the completed event of UpgradeToSslAsync comes.
The issue doesn't occur each time. It maybe there or not after I reinstall my program or reboot the machine.
I don’t know why this happened. Would you please give me some suggestion? Thank you very much!