IIS reverse proxy with rewrites can't handle a redirect from the server we proxy to

redirect url-rewriting iis-7 arr
IISrewriteproblems picture IISrewriteproblems · Nov 22, 2010 · Viewed 11k times · Source

We own server A, and on some occasions we rewrite requests to our partner on server B.

In some cases server B will respond with a redirect to a completely different website, which is what is expected, let's say server C. However, when that redirect form server B comes back to server A, server A interprets it as a redirect to a location on iteself (A) and not as a redirect to other website - server C.

How do I take note of the redirect to the external website and actually go there, rather than assuming that redirect is on my server (and 404ing)? We're running IIS 7 with the rewrite module.

Any help much appreciated.

Answer

LukasRos picture LukasRos · Jan 24, 2011

Go to the ARR proxy settings (they're hidden under IIS -> Application Request Routing Cache -> Server Proxy Settings) and uncheck the "Reverse rewrite host in response headers" checkbox. That should be enough.

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