IIS 8.0 with ARR and Windows server 2012
We use reverse proxy to rewrite the request to an external website. All rewrite rulres works besides one webpage with xml code only, BUT IT does not have HEADERS at all.
We forward https://mysite.com:85/webrequest?some=xml to http://55.55.55.55/webrequest?some=xml . The url is forwarded correctly to the reverse proxy, but the IIS ARR got invalid response.
Can it be because of missing headers on wepage http://55.55.55.55/webrequest?some=xml?
http://55.55.55.55/webrequest?some=xml can be accessed correctly by different browsers
Also, we checked everything, it accepts other similar webpages. Only this webpage without headers doesn't work.
Error:
HTTP Error 502.3 - Bad Gateway
The server returned an invalid or unrecognized response
Trace error: