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swagg boi's (RFC 4193 compliant) IPv6 ULA prefix spitter-outter!!

I got bored playing with html forms today and what I ended up with is this nifty form that turns a given MAC address into a /48 IPv6 ULA prefix. The form POSTs this string to a cgi script which is essentially a quick re-write of the first Perl script I ever wrote (just added some html cruft to the STDOUT). I got the idea for the first script since I couldn't find a simple way to generate an ULA from my terminal. I had to open up a browser and find other similar web-based tools with a web search but several of these didn't seem to really follow the RFC, i.e. printing out a /64 instead of a /48 or printing out the prefix with no MAC address or even a field to give it one. Maybe some wayward network nerd standing up an IPv6 lab will find this useful :)

Limit of 1,208,925,819,614,629,174,706,176 ULA addresses per customer.

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        [May one] doubt whether, in cheese and timber, worms are generated,
        or, if beetles and wasps, in cow-dung, or if butterflies, locusts,
        shellfish, snails, eels, and such life be procreated of putrefied
        matter, which is to receive the form of that creature to which it
        is by formative power disposed[?]  To question this is to question
        reason, sense, and experience.  If he doubts this, let him go to
        Egypt, and there he will find the fields swarming with mice begot
        of the mud of the Nylus, to the great calamity of the inhabitants.
                A seventeenth century opinion quoted by L. L. Woodruff,
                in *The Evolution of Earth and Man*, 1929
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It's UNIX baby, yeah!

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