자자…여기까지 오느라 수고하신 여러분을 위해 보너스 문제를 특별히 준비하였습니다.
이번엔 고생하신 여러분을 위해 패스워드를� 알려드리기 위해 TCP 포트하나를 열어 두고 있습니다. 그런데 불행히도 몇 번 포트였는지 기억이 나질 않는군여…아무튼 수고 ~~~

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포트를 확인했습니다.

[level6@drill /etc]$ netstat -an

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:100             0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:15              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:23              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:6969            0.0.0.0:*               LISTEN
tcp        0      0 211.239.123.40:23       140.180.190.188:35326   ESTABLISHED
tcp        0     26 211.239.123.40:23       202.188.42.171:1114     ESTABLISHED
tcp        0      0 211.239.123.40:23       209.30.82.102:44223     ESTABLISHED
tcp        0    548 211.239.123.40:23       143.248.195.159:1755    ESTABLISHED
tcp        0      0 211.239.123.40:23       211.211.12.248:62782    ESTABLISHED
tcp        0      0 211.239.123.40:23       203.106.170.37:1060     ESTABLISHED
tcp        0      0 211.239.123.40:23       24.242.43.51:61131      ESTABLISHED
tcp        0      0 211.239.123.40:23       68.193.229.173:3701     ESTABLISHED
tcp        0      0 211.239.123.40:80       222.122.19.161:37199    TIME_WAIT
tcp        0      0 211.239.123.40:23       80.89.239.61:44494      ESTABLISHED
udp        0      0 0.0.0.0:5555            0.0.0.0:*
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node Path
unix  14     [ ]         DGRAM                    946    /dev/log
unix  2      [ ]         DGRAM                    12010500
unix  2      [ ]         DGRAM                    12009206
unix  2      [ ]         DGRAM                    12009155
unix  2      [ ]         DGRAM                    12008627
unix  2      [ ]         DGRAM                    12007070
unix  2      [ ]         DGRAM                    12003967
unix  2      [ ]         DGRAM                    11995722
unix  2      [ ]         DGRAM                    5523675
unix  2      [ ]         DGRAM                    5138406
unix  2      [ ]         DGRAM                    6654
unix  2      [ ]         DGRAM                    1669
unix  2      [ ]         DGRAM                    1064

[level6@drill /etc]$ telnet locahost 100
bash: /usr/bin/telnet: Permission denied
[level6@drill /etc]$ nc
bash: nc: command not found
[level6@drill /etc]$

되는게 없더군요;;

결국 제 윈도 머신에서.. telnet drill.hackerslab.org 6969 접속해서 성공했습니다.