Re: SMB shares
Why? Gpod alone knows.
Most 'amateur' connections are via NAT routers. Which need explicit configuration to actually accept incoming connections.
One can only posit a very very poorly set up leased line system, in which intersite working was done simply by opening ports onto full publicly addressable IP spaces as 'the quickest way to get the job done'
You have to work quite hard to be this insecure.