Using CloudFlare as a v6 to v4 Bridge

CloudFlare offers the ability for you to turn on CDN caching and present your service to the public without requiring a public IPv4 address (so long as you have a publicly accessible v6 address) To turn it on, add the DNS entry to your domain on CloudFlare, and then turn on the caching service (Coloured in logo)

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The caveats with the CDN are the same as if you had a v4 address; only certain ports (eg. 80, 8080, 443 , 8443, etc.) work. The output from your server is cached/proxied via CloudFlare’s CDN servers. So it’s not a full fix; eg. no port 22 to ssh in, but for running a web/http based service can be quite useful.