Today I read that Microsoft has no more IPv4 addresses for its Azure cloud. Earlier this week I read that Latin America is out of IPv4 addresses as well. These are real - not predicted - IPv4 address shortages. I remember we had IPv6 day two years ago, but since then I haven't heard much about IPv6 in the news.
I would like to have a good understanding of what the change to IPv6 really means, and where we can expect problems.
- I guess all modern operating systems are IPv6 ready: OSX, Windows, Linux, Android, iOS (no problem to be expected for most people).
- Internet providers: your connection to the internet, whether it's mobile or via cable or ADSL (my provider says it's completely IPv6 ready, but it's the only one this far in my country).
- Routers/modems may be a problem (and as my provider says it's completely IPv6 ready, I suppose the router works too).
- Hosting: I use a hosting provider for some websites that is not IPv6 ready. They promise to have this working this year. I guess many providers haven't got this working yet.
- Home devices: digital tv recorders, tv with wifi, thermostats, wireless loudspeakers etc - I have no idea if they are IPv6 ready.
- The internet at large: big websites like Google, Facebook - I guess they have this working.
- Internet exchanges like AIX - this should work.
- Home network: if my router is IPv6 ready, will it translate to IPv4 for devices that don't understand IPv6?
- Can these home devices still use IPv4 when the rest of the home network is IPv4?
- For sites that are still IPv4 only, will my computer or router switch automatically?
- When I open whatismyip.com, I see an IPv4 address. I believe I can ask my provider to change to IPv6, but I guess that will disable large parts of the internet for me - will it? Can I still send mail, will DNS work?
- When my provider changes to IPv6, will I still have an IPv4 address?
- Does this have consequenses for TLS certificates?
- With IPv6 NAT is obsolete I understand. Will this mean my wifi enabled tv is directly accessible from the outside? I guess the router firewall is still working, but now we can use a direct address from the outside?
- I don't live in Latin America and don't use Azure. But what if I go to Brasil right now. Will I notice it?
- Is there an easy way to test what works and what not without messing up the home network?
These are several situations and questions I can think of now. There are probably many more. What I want is a good picture of where we're standing now, and what we can expect to happen when this shortage becomes worldwide.