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  • digii.co.kr/2021/10/17/%ec%86%94%eb%a6%ac%eb%93%9c-%ec%8a%a4%ed%85%8c%ec%9d%b4%ed%8a%b8-%ec%a1%b0%eb%aa%85-%ec%86%8c%ec%8a%a4-%ec%8b%9c%ec%9e%a5-2021-%eb%b9%84%ec%a6%88%eb%8b%88%ec%8a%a4-%eb%ac%b4%ec%97%ad-%ec%88%98/ (port 80)