I have some experience with the UTM, but today I inherited a dozen of Web Appliances without any explanation... .
It should be the easiest task imaginable, but I can't find out how to block single websites instead of categories from the Management Appliance. I need to block Facebook, Twitter and Instagram but blocking their respective categories would block a lot more than what I want. The only place where I could add URLs is the local site list, but if I understand it correctly that should include only URLs that are not in the Sophos DB (or things that need to be overruled).
Could anyone point me in the right direction?
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