Level
Goal
The password for the next level can be retrieved by submitting the password of the current level to port 30000 on localhost.
다음 레벨의 패스워드는 localhost의 30000번 포트에 현재 레벨의 패스워드를 제출하면 획득할 수 있다.
Commands you may need to solve this level
ssh, telnet, nc, openssl, s_client, nmap
Helpful Reading Material
How the Internet works in 5 minutes (YouTube) (Not completely accurate, but good enough for beginners)
IP Addresses
IP Address on Wikipedia
Localhost on Wikipedia
Ports
Port (computer networking) on Wikipedia
Exploit
bandit14@bandit:~$ nc -zv 127.0.0.1 30000
Connection to 127.0.0.1 30000 port [tcp/*] succeeded!30000번 포트가 열려 있음을 확인할 수 있다.
bandit14@bandit:~$ nc 127.0.0.1 30000
10