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  • bitdays.co.kr/2021/09/15/%ec%a0%95%ed%98%95-%ec%99%b8%ea%b3%bc-%ec%9e%84%ed%94%8c%eb%9e%80%ed%8a%b8-%ec%8b%9c%ec%9e%a5-%ed%81%ac%ea%b8%b0-%ea%b3%b5%ec%9c%a0-2021-%ec%b5%9c%ea%b3%a0-%ec%84%a0%eb%8f%84-%ea%b5%ad%ea%b0%80/ (port 80)