Hi, The router's log message in my last post was the result when setting it up via its SixXs specific option, with this I got no tunnel at all (no global IPv6 address on any interface). I've tested other configuration options as well (the router is capable of native connections and offers the following tunneling methods: "6to4", "6RD", "SixXs", "6in4") and now I've got some new information, interesting test results and new questions: I initially had problems with 6to4, which was my reason to try SixXs instead, I've resolved those now, so 6to4 works correctly. Nonetheless I'd like to get my SixXs tunnel also up and running. I mention this to make the following remarks more clear. No matter which tunneling method (6to4, 6in4) is chosen, the router won't display the DNS servers on the configuration page, the two fields remain empty, but resolution works. This made me think that 6to4 was broken in the first place, but now I think this is the router's normal behaviour; perhaps DNS servers are only shown on native v6 connections. When looking at my tunnel's configuration page at SixXs in order to check whether I made a mistake, I noticed that SixXs uses 6in4, so I had the idea to use my router's generic 6in4 configuration option rather than the SixXs specific one. The following paragraphs are all about the generic 6in4 configuration: In the generic 6in4 configuration there's no place to enter a TIC password and server; I assume this isn't really necessary to set up the tunnel? Do I have to delete the password on the SixXs tunnel configuration page to make it work without the TIC server? The router correctly gets a subnet, my hosts also get valid IPv6 addresses. IPv6 DNS resolution works (I see AAAA records being returned in Tcpdump). However, I cannot get any data through the tunnel. IPv4 connections to web pages are significantly delayed or even time out. I think this is because IPv6 is tried first and then fails. My router shows the following log entries: Please note that it incorrectly says "6to4" despite of "6in4" being configured. This might be a display-only bug in the firmware, but I'm not sure about this. The messages mean that a connection was set up successfully, but I get the problems I described above. I hope you've got a solution for me or at least an idea what to try next. If I need to change my tunnel type into a heartbeat one, I'm in a deadlock situation, because I'm a new user and have only got 10 ISK left, cannot get the tunnel to work to earn more ISK, but would need 15 ISK to make the change. Christoph

If you configure a Fritz!Box using TIC (thus the "SixXS" option), then you need to have a heartbeat tunnel. As you have a static tunnel, you should use the static 6in4 option. (Bit odd that Fritz!Box does not recognize that configuration method, but oh well)