yes, I altered mysite.com. Those requests come from unknown clients. I will test using different browser, to see how request headers affective I read some articles about remove: ETag; here: http://mark.koli.ch/2010/09/understanding-the-http-vary-header-and-caching-proxies-squid-etc.html But no luck for me. I'm going to disable Vary options in original server, too On Fri, Apr 5, 2013 at 10:39 AM, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > You will have to supply the HTTP headers sent to Squid by cleint and server > for each of those transactions. > > FWIW the URLs you supplied show up as 404 errors in the mysite.com CDN. Did > you alter the log? > > Amos > -- Best Regards, Trung Kiên.