elfin, 
Ok. I have an opportunity to do some serious fucking about with IPv6 but got some questions first.
I got Machina, been production and a very good boy with excellent IP reputation for a long time.
Months ago Rebuilt shit with AlmaLinux, tested, moved to new server but my new server I HAVE the opportunity to just not answer IPv4.
I had just do it, move my personal domain there and watch it burn in interesting ways but I'm super curious, anyone here tried it?
