MVC ignores route prefix

Question

One of our MVC sites has some odd URLs showing up in google analytics:

www.domain.com/(F([long 232 character hex string here]))/Route/etc

There's a very long string inserted before the main route which the MVC routing ignores.

What is this?

I know this site runs MVC and the same thing happens: https://stackoverflow.com/(F())/users/login

Answer 1

To answer your question: According to http://msdn.microsoft.com/en-us/library/aa479315.aspx the "(F([long 232 character hex string here]))" is the Forms Authentication ticket for a cookieless request.