How to configure v3 to block all incoming/outgoing on boot????????

In v2.4 there was an option to block all incoming/outgoing on boot, it seems to not be included in v3. Is there a way to configure it this way? Do I have to create a global rule? If so, then how do I word it? Oh and, just a comment, it would have been nice to have been notified to save previous config file before upgrading to v3. Any help would be appreciated. :THNK