[wargame.kr] already got writeup문제can you see HTTP Response header?해당 사이트에 접속하면 받을 수 있는 http response를 까보면 flag를 얻을 수 있다.HTTP/1.1 200 OK Date: Sat, 20 Apr 2019 07:43:41 GMT Server: Apache/2.4.18 (Ubuntu) FLAG: 697037b1f9558d29bca1b70054cf083d36a656b5 Content-Length: 27 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: text/html; charset=UTF-8 you've already got key! :p