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  • bitdays.co.kr/2021/04/09/sonar-%ec%8b%9c%ec%8a%a4%ed%85%9c-%eb%b0%8f-%ea%b8%b0%ec%88%a0-%ec%8b%9c%ec%9e%a5-%ec%a0%90%ec%9c%a0%ec%9c%a8-%ec%88%98%ec%9d%b5-%eb%93%9c%eb%9d%bc%ec%9d%b4%eb%b2%84-%eb%8f%99%ed%96%a5-%eb%b0%8f/ (port 80)