it was hilariously easy

the host (linode) turned on ipv6 and i had to go push a button to get an address for my existing machine

i had to copy basically every dns record and add the new ip

then i changed a line in a file so my web server (nginx) would serve over ipv6

and i was done

unless you have some massive complicated networking setup, the hardest thing you’re probably going to hit is applications themselves that try to e.g. store ips as 32-bit integers in a database; that ain’t gonna fly with ipv6 and you’ll have to fix that first or every v6 visitor will either confuse your db or crash your app