Dealing with filtered 6to4 clients

[Chris Hills]

On 03/11/09 14:07, Martin List-Petersen wrote:
 > Google has done that. It's ipv6.google.com.
 >
 > And there is no problem accessing Google from an IPv6 only network, if
 > your network is whitelisted. Contact Google to get it whitelisted. I use
 > Google every day from a IPv6 only box.
 >
 > Services that don't work on IPv6 aren't available to IPv6 yet.

This is /not/ accessible from an IPv6-only network. The google 
nameservers are only v4-connected.

$ dig -6 +trace ipv6.google.com. in aaaa

; <<>> DiG 9.6.1-P1 <<>> -6 +trace ipv6.google.com. in aaaa
;; global options: +cmd
.                       112691  IN      NS      M.ROOT-SERVERS.NET.
.                       112691  IN      NS      L.ROOT-SERVERS.NET.
.                       112691  IN      NS      J.ROOT-SERVERS.NET.
.                       112691  IN      NS      B.ROOT-SERVERS.NET.
.                       112691  IN      NS      E.ROOT-SERVERS.NET.
.                       112691  IN      NS      C.ROOT-SERVERS.NET.
.                       112691  IN      NS      H.ROOT-SERVERS.NET.
.                       112691  IN      NS      D.ROOT-SERVERS.NET.
.                       112691  IN      NS      I.ROOT-SERVERS.NET.
.                       112691  IN      NS      G.ROOT-SERVERS.NET.
.                       112691  IN      NS      A.ROOT-SERVERS.NET.
.                       112691  IN      NS      F.ROOT-SERVERS.NET.
.                       112691  IN      NS      K.ROOT-SERVERS.NET.
;; Received 332 bytes from ::1#53(::1) in 2 ms

com.                    172800  IN      NS      a.gtld-servers.net.
com.                    172800  IN      NS      b.gtld-servers.net.
com.                    172800  IN      NS      c.gtld-servers.net.
com.                    172800  IN      NS      d.gtld-servers.net.
com.                    172800  IN      NS      e.gtld-servers.net.
com.                    172800  IN      NS      f.gtld-servers.net.
com.                    172800  IN      NS      g.gtld-servers.net.
com.                    172800  IN      NS      h.gtld-servers.net.
com.                    172800  IN      NS      i.gtld-servers.net.
com.                    172800  IN      NS      j.gtld-servers.net.
com.                    172800  IN      NS      k.gtld-servers.net.
com.                    172800  IN      NS      l.gtld-servers.net.
com.                    172800  IN      NS      m.gtld-servers.net.
;; Received 496 bytes from 2001:7fd::1#53(K.ROOT-SERVERS.NET) in 51 ms

google.com.             172800  IN      NS      ns1.google.com.
google.com.             172800  IN      NS      ns2.google.com.
google.com.             172800  IN      NS      ns3.google.com.
google.com.             172800  IN      NS      ns4.google.com.
;; Received 169 bytes from 2001:503:a83e::2:30#53(a.gtld-servers.net) in 
240 ms

;; connection timed out; no servers could be reached