
When this article first appeared on the 4GoodHosting blog in December 2015, the pool of unallocated IPv4 addresses for North America had run dry only three months earlier. IPv6 was described, here and almost everywhere else, as "the future of internet addressing." That framing has aged. IPv6 is no longer a future event that website owners need to wait for. It is the protocol that roughly half of the people reaching Google now arrive on, and it is already carrying traffic to and from a large share of websites whether their owners have noticed or not. Meanwhile, IPv4 has become something it never used to be: a scarce asset with a price attached. So this rewrite drops the "future" question and answers a more useful one. If you run a website in Canada, what does IPv6 mean for you right now? What should your hosting do, what can quietly break, and what is worth checking this week? The short answer If you only read one section, read this one. Your visitors are already using IPv6. Many phones on mobile data and many home connections reach websites over IPv6 first, and fall back to IPv4 only when they have to. Your website does not need to be IPv6-only, and should not be. The practical standard for a public website is dual-stack: reachable over both IPv4 and IPv6 at the same time. A half-configured IPv6 setup is worse than none. Publishing an IPv6 address in DNS for a server that does not answer properly on IPv6 can make your site slow or unreachable for some visitors. IPv6 is not a ranking factor, but a broken IPv6 path can still cause crawl and availability problems. IPv4 addresses now cost real money. That cost shows up in hosting prices, dedicated-IP add-ons and cloud bills, and it is not going back down. Firewalls, email and logs are where problems hide. Rules and settings written only for IPv4 are the most common source of IPv6 trouble on otherwise healthy sites. The rest of this guide explains each of those points and gives you a checklist you can work through with your host. Why "the future" no...






