Hi everyone,
Problem:
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My IIS Server web-app graphics are not being cached at the browser when accessed via the AWS Sophos UTM9 due to a no-cache element possibly being attached as the traffic flows via the AWS UTM9 server.
Symptom:
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If I access the AWS-based IIS server-based web page from a browser on the IIS server itself, browser caching works fine and when I look at the HTTP info using the browser debug tools everything looks as I expect. When I access the same page routed via the Sophos UTM9 AWS appliance browser caching does not occur and when I use the browser debug tools to look at the HTTP info there is a no-cache element that has magically been attached to the HTTP for the graphic elements that did not previously appear when accessed locally on the IIS server!
Anyone experience Sophos UTM9 adding a no-cache element to the traffic as it passes through?
I will continue to debug and have some suspicions it might be related to this being proxied SSL traffic. I will update this thread if I find anything new in my debugging. I thought I would post my problem early in case someone can save me time by pointing me to a solution or identifying this as a known Sophos quirk.
Thanks in advance...I'm good on the debugging side but suggestions are always welcome :-)
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