It really depends on how deep in the stack you're working. Apache and Nginx already have support for IPv6. If you're using something like node.js directly, you'

It really depends on how deep in the stack you're working. Apache and Nginx already have support for IPv6. If you're using something like node.js directly, you'll need to bind to an IPv6 port as well. For general IPv6 tools, check out: https://www.digitalocean.com/community/tutorials/how-to-configure-tools-to-use-ipv6-on-a-linux-vps https://www.digitalocean.com/community/tutorials/how-to-conf...