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https only works when cache is disables WHY? 
 
SNieves23
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Total Posts:  39
Joined:  2010-11-11
 

Hello all,
my https during check out only works when the cache is disables. The moment I enable anything the https stops working and certain images in the check out aren’t https. 3-4 images don’t seem to be secure. Why is this?

 
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wmcferr
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Total Posts:  174
Joined:  2010-11-16
 

It happens because Internet Options control panel’s Advanced tab includes an option “Do not save encrypted pages to disk.” When this option is set, caching directives from the server are ignored, and HTTPS-delivered resources will not be cached for reuse, even during the same browser session.

This option is unticked by default on all client versions of Windows, but is ticked by default on the Windows Server versions. Hence, most of your sites visitors will not have this option set. However, the option is occasionally set by Group Policy as an attack-surface-reduction measure, although the side-effects of doing so can be pretty dire. The problem is that this option makes SSL-delivered downloads uncacheable by default, and that can lead to the dreaded “Internet Explorer cannot download” dialog. Rather than use this option, I recommend you use BitLocker Drive Encryption and/or use the Delete Browser History on Exit option.

 
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