SonicWall NSA 3600, Geo-IP Filter & blocking sites

Our SonicWall firewall is setup to block some countries through the Geo-IP Filter, I would like to block everything outside the United States and only allow access to the required vendors sites which are located in Europe and Asia. I've been told that blocking all countries in the Geo-IP Filter then specifying specific sites to allow access to doesn't work. Is their a way to accomplish this or do they have to continue allowing access to entire countries to access these vendor sites?

We have a SonicWall NSA 3600 running Firmware version "SonicOS Enhanced", dated "TUE MAR 15 15:48:25 2016"
Juan SoneraNetwork AdministratorAsked:
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J SpoorTME / Network Security EvangelistCommented:
you will need to add those sites to an address group, then set those as an exclusion list.
Alternatively set GEO-IP to firewall rule based mode, then create firewall access rules to allow access to the sites without the GEO-IP checkbox

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As a supplement to the above suggestion, see the Sonicwall KB "How to configure SonicWALL Geo-IP Filter using Firewall Access Rules (SW9763)"
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