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  • bitdays.co.kr/2021/10/15/%25EB%25A9%2580%25ED%258B%25B0-%25EB%25B2%25A4%25EB%258D%2594-it-%25EC%25A7%2580%25EC%259B%2590-%25EC%2584%259C%25EB%25B9%2584%25EC%258A%25A4-%25EC%258B%259C%25EC%259E%25A5-2021-%25EB%25B9%2584%25EC%25A6%2588%25EB%258B%2588%25EC%258A%25A4-%25EB%25AC%25B4%25EC%2597%25AD-%25EC%2588%2598%25EC%259D%25B5/ (port 80)