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In my Fritzbox it states the following:

IPv6-Adresse: 2a02:8070:600::14b6:c7******, Gültigkeit: 100465/86065s
IPv6-Präfix:  2a02:8070:62c:3200::/56, Gültigkeit: 100464/86064s

I am not able to connect to IPv6 Addresses from computers configured by the fritzbox, because they get an address with prefix 2a02:8070:62c:3200::/56 but somehow the fritzbox does not route those addresses.

Is this because the IPv6-Address is not in the prefix range?

The address of the Fritzbox responds to pings, but my computers reached via various addresses from the prefix range do not (:

PING 2a02:8070:62c:3200:28d****(2a02:8070:62c:3200:28d****) 32 data bytes
From 2a02:8070:600:0:14b6*** icmp_seq=0 Destination unreachable: Administratively prohibited
From 2a02:8070:600:0:14b6*** icmp_seq=1 Destination unreachable: Administratively prohibited
From 2a02:8070:600:0:14b6*** icmp_seq=2 Destination unreachable: Administratively prohibited
From 2a02:8070:600:0:14b6*** icmp_seq=3 Destination unreachable: Administratively prohibited

blocked ping this is "view" from outside

From inside the ping6 looks like this:

traceroute -6
traceroute to (2a02:2e0:3fe:100::8), 30 hops max, 80 byte packets
1 (2a02:8070:62c:3200:****)  0.787 ms  1.424 ms  1.702 ms
2  * * *
30  * * *
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You get 2a02:8070:600::14b6:c7****** on the link to the ISP (WAN side) and 2a02:8070:62c:3200::/56 to be used inside your own network (LAN side). That shouldn't cause the problem you are describing. Is there a way to see the routing table and the firewall settings of the Fritz!Box? – Sander Steffann Dec 8 '12 at 15:24
PS: good to see that Kabel Baden-Wuerttemberg GmbH is doing IPv6 :-) – Sander Steffann Dec 8 '12 at 15:25
no i cant find anything where i can see the routes in the fritzbox:( – kmindi Dec 8 '12 at 15:42
Administratively prohibited does indicate that it's a firewall blocking the traffic – Sander Steffann Dec 8 '12 at 16:23
yeah from outside that is ok, but from inside i cant reach to outside. – kmindi Dec 8 '12 at 16:29
up vote 1 down vote accepted

My settings were all correct, it seems like it was a issue in the network of Kabel BW but I can't say because I am no operator. It just started to work again.

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