OpenDNS and IPv6

In general OpenDNS works just fine, but for some reason, they return IPv4 adresses when a hostname only has IPv6 addresses. This makes e.g. ipv6.google.com fail.

You can test this by opening /Applications/Utilities/Terminal.app and run the command:

host ipv6.google.com

Good output is like:

ipv6.google.com is an alias for ipv6.l.google.com.
ipv6.l.google.com has IPv6 address 2001:4860:a003::68

Bad output with IPv4 address is like:

ipv6.google.com is an alias for ipv6.l.google.com.
ipv6.l.google.com has address 67.215.65.132
ipv6.l.google.com has IPv6 address 2001:4860:a005::68