'stop network activity' and 'restore network activity' failes

It’s not a great problem and it’s not a bug for me. I love the ability to use the firewall to disconnect the computer from the network (stop network activity) for a while and then reconnect/restore again. But the disconnection takes a while, I can’t connect the PC to the network anymore. Then I disconnect the cable and hope that the network is restored after the cable connection.

When I want to stop network activity I do it by disconnect the cable.