What is 2002:836b:0F1E::836b:0F1E and why am I seeing it?

(NOTE: IP Addresses changed to protect the innocent) I was onsite with a customer recently who asked me a question: “What is 2002:836b:0F1E::836b:0F1E and why am I seeing it?” I explained that this is a 6to4 address and is automatically assigned to the client because they use a globally routable IPv4 range for their IPv4…

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