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  • bitdays.co.kr/2021/04/12/%ec%83%9d%eb%ac%bc-%ea%b2%80%ec%b6%9c%ea%b8%b0-%ec%8b%9c%ec%9e%a5-%ed%81%ac%ea%b8%b0-%eb%b6%84%ed%95%a0-%ec%97%b0%ea%b5%ac-%eb%b6%84%ec%84%9d-%eb%8f%99%ed%96%a5-%ec%8b%9c%ec%9e%a5-%ec%a0%90/ (port 80)