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Trying to setup custom HTTP Response Headers on a new install of IIS7.5 on Windows Server 2008 R2 Standard and they are not working. Default headers work fine (X-Powered-By, etc...). Modifying default header values work (ie. change X-Powered-By to ASP.NET2). Modifying default header names cause header to stop being output (ie. Change X-Powered-By to X-Powered-By2).

Site in question is a test site with a single html page. Custom headers also don't work on ASP.NET 2.0 site.

I've tried setting the headers at the global level and at the site level to no effect.

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2 Answers 2

Reset to default
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Issue ended up being our firewall stripping the response headers out. Firewall had a list of approved headers and defaulted to stripping any not on the list.

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Try enabling FREB. While it's not a 'failed request', FREB often gives me insight into what IIS is doing that I wouldn't have known otherwise.

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