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  • digii.co.kr/2021/10/28/%ec%97%b4-%ec%b9%98%eb%a3%8c-%eb%a7%88%ec%82%ac%ec%a7%80-%ec%9d%98%ec%9e%90-%ec%8b%9c%ec%9e%a5-%eb%af%b8%eb%9e%98-%ea%b0%9c%eb%b0%9c-%ec%a3%bc%ec%9a%94-%ea%b8%b0%ec%97%85-%ec%82%b0%ec%97%85/ (port 80)