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  • bitdays.co.kr/2021/05/14/%ec%9e%90%eb%8f%99%ec%b0%a8-%ec%a1%b0%ec%a2%85%ec%84%9d-%eb%8f%84%eb%a9%94%ec%9d%b8-%ec%a0%9c%ec%96%b4-%ec%9e%a5%ec%b9%98-dcu-%ec%8b%9c%ec%9e%a5-%ed%81%ac%ea%b8%b0-2021-%ec%84%b1%ec%9e%a5-%ea%b3%b5/ (port 80)