- https://cybrary.it/
- https://n0where.net/
- https://www.offensive-security.com/metasploit-unleashed
- http://resources.infosecinstitute.com/
- http://www.windowsecurity.com/articles-tutorials/
- https://www.sans.org/reading-room/
- https://www.corelan.be/index.php/articles/
- http://opensecuritytraining.info/Training.html
- https://www.blackhat.com/html/archives.html
- http://www.securitytube.net/
- https://threatpost.com/
- https://www.deepdotweb.com/
- https://packetstormsecurity.com/
- https://www.cvedetails.com/
- http://routerpwn.com/
- http://www.exploit-db.com/
- https://www.rapid7.com/db/
- http://0day.today/
- https://overthewire.org/wargames/
- https://www.pentesterlab.com/
- http://www.itsecgames.com/
- https://exploit-exercises.com/
- https://www.enigmagroup.org/
- http://smashthestack.org/
- http://3564020356.org/
- https://www.hackthissite.org/
- http://www.hackertest.net/
- http://0x0539.net/
- https://vulnhub.com
- https://ringzer0team.com/
- https://root-me.org/
- https://microcorruption.com