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  • bitdays.co.kr/2021/09/15/%25EC%2595%2595%25EC%25A0%2584-%25EC%2584%25B8%25EB%259D%25BC%25EB%25AF%25B9-%25EB%25B3%2580%25EC%2595%2595%25EA%25B8%25B0-%25EC%258B%259C%25EC%259E%25A5-%25ED%2581%25AC%25EA%25B8%25B0-2021-%25EC%25A4%2591%25EC%259A%2594%25ED%2595%259C-%25EC%2584%25A0%25EC%2588%2598-%25EC%25A7%2580%25EC%2597%25AD-%25EC%25B5%259C/ (port 80)