Level 14

Connect to the server using bandit14 and the private key.

The password for the next level can be retrieved by submitting the password of the current level to port 30000 on localhost.

Good old telnet should do the trick here.

bandit14@bandit:~$ telnet localhost 30000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
4wcYUJFw0k0XLShlDzztnTBHiqxU3b3e
Correct!
BfMYroe26WYalil77FoDi9qh59eK5xNr

Connection closed by foreign host.
bandit14@bandit:~$