IIS Browser caching not working

Posted by Karthik on Stack Overflow See other posts from Stack Overflow or by Karthik
Published on 2010-03-12T01:31:08Z Indexed on 2010/03/12 1:37 UTC
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iis

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caching

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pagespeed

Hi, I have enabled caching in IIS 6 for all our static images and CSS(by right clicking on those folders in IIS and enabled Content Expiration after 30 days under HTTP Headers).

When I run Google PageSpeed, and look at the resources tab, the status of those images and css shows up as 200, but I was expecting a 304(not modified). When I checked Yahoo.com in Pagespeed, all its images have a 304 status. So my caching is not working? or is this how IIS content expiration works.

Any help would be appreciated.

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