Then, booting a local node is a minimum condition for contribution to the network, right?
1) yes
Is this true even with a closed port?
It is necessary to boot in order to contribute but not sufficient. You need to either start harvesting and/or open port 7890 to bring value to the network.
1) In case of not harvesting, did I understand the condition of contribution right?
Running NIS/NCC ---> open wallet ----> booted(synchronized) & choose remote server(open port 7890) ----> "close wallet" or let it open.
2) In setting, auto boot is more influential than remote server in contribution to network? Or...?