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How can I execute a script or program whenever my (world-routeable) IPv6 prefix changes?
If there is (currently) no easy way to do this, a pointer to the corresponding Posix system calls would be totally okay for me. I could code some C myself then. But currently I'm a bit lost on this issue.
Background: My ISP (consumer contract) only gives me a world-routeable IPv6 prefix with a lifetime of about a day. There are some good reasons to do so (make network relocations possible) but my ISP (in contrast to my old one) does not simply re-assign my old prefix to me after its lifetime expired but gives me a completely new one. I now want to update some external DNS with my new prefix when that happens.
How are you currently configuring IPv6? Maybe there is a useful hook there. – a CVn – 2014-11-20T11:59:25.913