IPv6 regex I spent too much time today playing with IPv6 stuff that I didn't have any time to work on my latest time sink, Pyrobox. I will have to write about that some other time. For now, I wanted to get this out there. I was curious about how easy it was to confirm that a string is a valid IPv6 address. It turns out that it is not so simple, thanks to the "space saving" techniques of zero folding that is used. Here are some examples of IPv6 addresses that are valid: :: unspecified address ::1 localhost fe80::219:7eff:fe46:
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