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  • bitdays.co.kr/2021/02/25/%ea%b8%b0%ec%97%85-%ec%86%8c%ec%85%9c-%eb%84%a4%ed%8a%b8%ec%9b%8c%ed%82%b9-esn-%ec%86%8c%ed%94%84%ed%8a%b8%ec%9b%a8%ec%96%b4-%ec%8b%9c%ec%9e%a5-2021-%ec%84%b1%ec%9e%a5-%ec%9d%b8%ec%9e%90-%ec%b5%9c/ (port 80)