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  • bitdays.co.kr/2021/04/07/%ec%9e%90%eb%8f%99%ec%b0%a8-%ec%9e%90%eb%8f%99-%eb%b3%80%ec%86%8d%ea%b8%b0-at-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ec%8b%9c%ec%9e%a5-%ec%a0%95%ec%83%81-%ed%9a%8c%ec%82%ac-%ed%81%ac%ea%b8%b0-%eb%b6%84/ (port 80)