An operating system that support IPv6: Windows Vista and modern versions and Mac OS and Linux latest versions support IPv6. Windows XP doesnt, and we should not be using XP anymore.
A router with IPV6 support: Most of the modern routers comes with IPv6 support
An ISP that supports IPV6.
The below page helps to test the IPv6 http://ds.testmyipv6.com/
The IPv6 only test:
If we attempt to connect to this server and times out, then it means that we don’t have IPv6 path to the server. The below could be possible reason for this
1. The client is not having globally routable address on the internet and therefor not actually making the connection to this server
2. The client is IPv6 capable, but does not know that it is limited to the local network. But there is no IPv6 connectivity beyond the router
If the browser returns an error saying that the host cannot be found, then the DNS servers that we are using don’t know how to look up the address of the server based on the hostname. They are unable to resolve the AAAA record. If one is using the DNS server addresses provided by the ISP, then we need to ring them up and ask to fix ASAP.
If we are using local gateway or router for DNS, then router is not capable or forwarders used by the router (likely the ISP’s servers) is not capable.
IF browser is able to connect to IPV6 only page, but still shows red box when taking the Dual Stack test, the browser seems to be preferring IPV4 over IPV6, which is undesirable.
References
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