Its a big headache to make the http compression and url rewriting to get working at same time.

Even though some valuable posts on it are available like:; there is a lot of R&D and trials required to make it working in 4.5 ( 2012)

I did the same and I made it working. I verified the results in Fiddler, Yslow like tools and all of my site aspx pages are now GZIP compressed. Now the page traffic has increased by 100% and obviously the page size also got reduced by an unbelievable margin….

Steps to follow are:

1. Modify the urlcompression node value as:

<urlCompression doStaticCompression=”true” doDynamicCompression=”true” dynamicCompressionBeforeCache=”false” />

2.  Make sure the rewrite modules in module list is right at the bottom , when the ‘View Ordered list’ is clicked in IIS -> Rewrite Module node

3)      Modify the registry as:

reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\InetStp\Rewrite /v LogRewrittenUrlEnabled /t REG_DWORD /d 0

4)      Restart IIS once the reg key is changed

Thats all !!!!

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