picoCTF 2019 writeup what's a net cat?

what's a net cat? (General Skills)

Using netcat (nc) is going to be pretty important. Can you connect to jupiter.challenges.picoctf.org at port 25103 to get the flag?

問題文の指示に従って、ncで接続。

> nc jupiter.challenges.picoctf.org 25103
You're on your way to becoming the net cat master
picoCTF{nEtCat_Mast3ry_d0c64587}

フラグが得られた。