Hand over variables to a website without a querystring

Question

I have a web-application (ASP.NET) and want to open another external webpage on another machine. I have to forward some information (variables) to that webpage, but they should not be part of the URL. So my question is, how can I achieve this without querystrings?

Answer 1

Session variable will only work on the same backend web server. Your options are writing to a cookie or an HTTP POST.