Nope, you're on a LAN, and usually the router has a firewall that blocks inbound connections by default. Some OSs (like Windows) also have their own by-default

Nope, you're on a LAN, and usually the router has a firewall that blocks inbound connections by default. Some OSs (like Windows) also have their own by-default firewalls that block connections from hosts on different networks out of the box.