Is this ARR warning causing my 404?

Question

I\'m getting a 404 during a URL redirect/rewrite, and I\'m unable to pin down exactly what\'s causing it.

The warning is:

REWRITE_DISABLED_KER

Answer 1

All your rules look OK.

It seems like you need to enable ARR's proxy forwarding feature which is disabled by default, REWRITE_DISABLED_KERNEL_CACHE also gives a clue about it.

To enable proxy forwarding; open an elevated command prompt on the server and enter the following command.

appcmd.exe set config  -section:system.webServer/proxy /enabled:"True"  /commit:apphost

Or have a look at Creating a Forward Proxy Using Application Request Routing.