*, windows open specific ports so that programs can be accessed
1. Control Panel - System and Security - Windows Firewall
Or in one step: search for firewall keywords directly in the control panel
2. Find "Advanced Settings" in the left menu bar of Windows Firewall
3. Find "Inbound Rules" in Advanced Settings
4. Find "New Rule" in the right menu bar of inbound rules
Inbound: is the filtering rule when accessed by other machines
5. To be added in depth~