In this level we are told to connect to the server localhost on port 30000, and send it the current password.
We can use netcat to achieve this. The command for netcat is nc, and it has the syntax nc <address> <port>.
nc localhost 30000
Once connected, we are given a text prompt where we can input data. Entering the password for the current level reveals the password: jN2kgmIXJ6fShzhT2avhotn4Zcka6tnt