Inspired by the IPv6 episode from ChaosRadioExpress I tried tunnelbroker.net as a my 6in4 provider, because Unity Media cannot get native IPv6 running for long-term customers (ridiculous: new customers get it without any problem). tunnelbroker enables you to build a static tunnel, which is quite problematic if you have a DSL connection or something similar that changes it's IPv4 frequently. I use my Raspberry-PI, running on ArchLinux ARM, together with this litte ruby script to keep my public IP updated.
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