Quick tip if you want IPv6 off on macOS 12 Monterey, since Apple disabled the Off option from the Configure IPv6 toggle, for my own safety, of course:
On WiFi:
$ networksetup -setv6off Wi-Fi
On Ethernet:
$ networksetup -setv6off Ethernet
so.cl
Rascals are always sociable, and the chief sign that a man has any nobility in his character is the little pleasure he takes in others company. Arthur Schopenhauer