netsh

Check Windows Firewall state:

netsh advfirewall show currentprofile

See all Windows Firewall rules for inbound connections:

netsh advfirewall firewall show rule dir=in name=all

Be aware that most built-in rules on Windows are bound to particular applications. But admins are lazy, and seldom bind custom rules to explicit applications. There’s no 100% reliable way to identify custom rules from the command line, but they’ll often have obvious naming conventions.

See all Windows Firewall rules for outbound connections:

netsh advfirewall firewall show rule dir=out name=all

Punch a hole in the Windows Firewall for ports 80, 443, and 4444:

netsh advfirewall firewall add action=allow name=tunnel_in `
	dir=in protocol=tcp localport="80,443,4444"
netsh advfirewall firewall add action=allow name=tunnel_out `
	dir=out protocol=tcp localport="80,443,4444"

In general you don’t want to turn off the Windows Firewall, as doing so will generate a popup for any users currently logged into the machine.