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In the past, one could use an IPv6 server through sixxs.net gateway. Now the service is gone.

However, I found there is a free Cloudflare gateway. I assume the IPv6 server is to be associated to a domain or subdomain through an AAAA record. I don't think this is possible otherwise.

However, Cloudflare docs are full of marketing hype and I don't actually understand if an IPv4-only client will be able to access IPv6-only servers through them (for ssh or for hosting a webserver).

Can you give me an answer, please?

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  • Cloudflare provides a free service level. Any reason why you haven't just tried it? Commented Sep 19, 2017 at 23:14
  • Exactly what protocol are you trying to use? Your question is tagged DNS but asks about SSH and HTTP. I doubt you can do SSH with the free service because in order to work with a non-modified SSH client it requires a separate IPv4 address per backend. Commented Sep 20, 2017 at 12:55
  • @SanderSteffann: You are not totally wrong) However, before making the tests (so getting the IPv6, setting up the server, registering it with Cloudflare), I wanted to probe if someone had some previous knowledge/experience, considering how common Cloudfare is. What for setup everything if I know in advance it would not work as (I understand is) advertised? Commented Sep 20, 2017 at 20:54
  • @kasperd: SSH and HTTP are the desired services. I mentioned DNS, because I had in mind a managed DNS provider routing requests from an IPv4 client to an IPv6 server. If the gateway service does not provide a DNS too, how can it be reached by an IPv4-only client? Commented Sep 20, 2017 at 20:56
  • @antonio DNS is difficult to get right even when no proxy is involved. Proxying DNS traffic is complicated, and I don't know if anybody tried to do it. It's something I have wanted to implement myself, but I haven't had the time. But do you really need DNS traffic to be proxied? Is there any reason you can't have your domain hosted on authoritative servers with dual stack connectivity? Commented Sep 21, 2017 at 19:50

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Yes, cloudflare support IPv6 addresses to your origin server, and will accept both IPv4 and IPv6 from clients.

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I am currently using a Vultr server which is $2.5 per month, and only support IPv6

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  • Does that support any other protocols than HTTP? Can it do SSH, DNS, and SMTP? (The question mentions SSH and HTTP and is tagged DNS) Commented Jul 30, 2018 at 6:05
  • I think it's only for HTTP on ports 80/443. The question says "SSH or HTTP" - this works for HTTP. If they meant "SSH AND HTTP", then the question should be updated. I use VULTR Console to access the console (not SSH). I also use Putty on another cloud machine which has both IPv4 and IPv6 to connect via SSH. Commented Aug 2, 2018 at 3:46

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