4 ms·

So you can basically start telling the internet "I AM THIS IP" and eventually the internet will go "YOU ARE THIS IP" ?

• runn1ng 14y ago
  Yes. As far as I know, that's what happened when Iran started blocking YouTube in Iran and mistakenly blocked it in entire world. Luckily, AFAIK, BGP is trust-based, so things go to normal pretty quickly.
  • deleted 14y ago
    [deleted]
  • rakslice 14y ago
    Did you mean Pakistan? http://www.ripe.net/internet-coordination/news/industry-developments/youtube-hijacking-a-ripe-ncc-ris-case-study http://www.ripe.net/internet-coordination/news/industry-deve...
• jlgaddis 14y ago
  In theory, yes. In reality, most ISPs (that I've dealt with, anyway) do prefix filtering to prevent just this sort of thing.
  • antihero 14y ago
    What is prefix filtering?
    • claudius 14y ago
      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).