https://pwnable.kr/
https://hack.me/
https://ctflearn.com/
https://google-gruyere.appspot.com/ #TheCyberArmy
https://www.root-me.org/en/
https://www.hackthebox.eu/
https://www.hacking-lab.com/
http://www.gameofhacks.com/
https://overthewire.org/
https://microcorruption.com/
https://www.hackthissite.org/pages/index/index.php
https://crackmes.one/
https://pentest.training/
https://www.hellboundhackers.org/
http://hax.tor.hu/
https://thisislegal.com/
https://tryhackme.com/
https://pwnable.xyz
https://pwnable.tw
와 같은 워게임 사이트도 있고, https://ctftime.org와 같은 사이트에서 CTF관련 일정 확인하고 try 해보는것도 최신 기술을 익히는데 도움이 많이 될 것 같습니다 ㅎ