It may happen to anyone – mistaken security rule “Any Any Drop”, or using dynamic object for URL block. The end result – after the policy install you have no administrative access to the firewall with SmartDashboard/ssh/https. For this case Check Point came with fw unloadlocal console expert level command to unload the Security Policy. Unlike the Initial policy when installing the firewall, here you get a firewall without ANY policy – open by any port from any source. So probably a good idea to do so after you physically disconnect the firewall from the Internet. Next step is to connect to this “naked” firewall with SmartDashboard and fix the mistake that caused this situation and install the fixed Security policy.