I have Apache with mod_proxy setup as a reverse proxy above IIS. Not matter what I do I get Proxy Error - Invalid response from upstream server error.

I have set the timeouts to 2400 seconds still errors. I am hitting IIS directly for debugging and everything works fine there. So this is not issue with IIS.

I think the only way to debug now is to log what response Apache is getting from IIS. How can I enable this type of logging?



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