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January 27, 2018, 02:40:08 AM |
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In theory, bitcoin has no central server. In practice, however, bitcoin software often obtains a list of peer nodes through DNS Seed, allowing users to quickly discover peer nodes. Since the DNS server can provide you with some fixed malicious or invalid nodes, it is theoretically possible that this will be exploited, but as far as I know, Bitcoin has not seen such an attack yet. Fortunately, using DNS Seed is not the only way of establishing a peer-to-peer connection. For example, you can specify your DNS address yourself or violently enumerate IP addresses to establish a peer-to-peer connection.
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