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A comment on The Pirate Bay – North Korean hosting? No, it’s fake. Parent comment

Re:The Pirate Bay – North Korean hosting? No, it’s fake by jlgaddis on Monday March 04, 2013 @08:19PM (#5322260)
In theory, yes.

In reality, most ISPs (that I've dealt with, anyway) do prefix filtering to prevent just this sort of thing.

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Re:The Pirate Bay – North Korean hosting? No, it’s fake by antihero on Tuesday March 05, 2013 @12:28PM (#5325857)
What is prefix filtering?
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Re:The Pirate Bay – North Korean hosting? No, it’s fake by claudius on Tuesday March 05, 2013 @02:16PM (#5326648)
To tell anybody ‘I AM ISP A’ you will have to connect physically to some ISP C. C will then (hopefully) check you and if you go ‘I AM ISP A’ he’ll ignore you and don’t tell anyone unless you’re really ISP A and he determined you to be this guy.

There are rather obvious limits, however, for example you will likely have to believe your ISP C if he says ‘I AM ISP B NOW, TOO’. If you then connect to another ISP D, and tell him ‘I KNOW ISP B’, D will have to decide whether to trust you (likely if you are a large telecom company) or not (if you just happen to have two 10 MBit/s lines to C and D each).

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