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  • bitdays.co.kr/2021/05/05/%25EC%259D%25B8%25EC%258A%25A4%25ED%2584%25B4%25ED%258A%25B8-%25EA%25B5%25AD%25EC%2588%2598-%25EC%258B%259C%25EC%259E%25A5-%25EB%25B3%25B4%25EA%25B3%25A0%25EC%2584%259C%25EB%258A%2594-%25EC%2584%25B8%25EA%25B3%2584-2021-%25EC%2582%25B0%25EC%2597%2585-%25ED%2581%25AC%25EA%25B8%25B0%25EC%2597%2590-%25EA%25B3%25B5/ (port 80)