We are having an issue with IIRF when it tries to process lengthy URLs with large querystrings - e.g.
This URL is does not even have a rewrite rule on it. Removal of IIRF off the website in IIS fixes it. Reducing the length of the URL (e.g. abbreviating querystring parameters) fixes the problem - but unfortunately requires fixing lots of code.
Are you able to let us know what could be the cause? There are no errors in the log for this issue - when browsing to the page (in chrome) it just shows:
Error 324 (net::ERR_EMPTY_RESPONSE): Unknown error.