Legal/ethical hacking. Information security.
InformationSecurity.Legal/ethicalhacking.Independentsecurityresearchandsecurityadvisories.
Nmap: the Network Mapper - Free Security Scanner
NmapFreeSecurityScanner,PortScanner,&NetworkExplorationTool.DownloadopensourcesoftwareforLinux,Windows,UNIX,FreeBSD,etc.
lu4nx@blog
Hacking,OpenSource,FreeSoftware,Unix/Linux,Emacs,Lisp
Ethical Hacking Tutorials, Tips and Tricks - Free Tutorials, Tools, How to's
AllaboutEthicalHackingTutorials,TipsandTricks,FreeTutorials,Tools,Howto'sforbeginnerorintermediatewithsimplestepbystepwithimage.
Hack This Site
HackThisSite.orgisafree,safeandlegaltraininggroundforhackerstotestandexpandtheirethicalhackingskillswithchallenges,CTFs,andmore.
Learn Ethical Hacking and Penetration Testing Online | Learn ethical hacking, penetration testing, cyber security, best security and web penetration testing techniques from best ethical hackers in security field.
Learnethicalhacking,penetrationtesting,cybersecurity,bestsecurityandwebpenetrationtestingtechniquesfrombestethicalhackersinsecurityfield.
Kali Linux | Penetration Testing and Ethical Hacking Linux Distribution
HomeofKaliLinux,anAdvancedPenetrationTestingLinuxdistributionusedforPenetrationTesting,EthicalHackingandnetworksecurityassessments.
Vulnerable By Design ~ VulnHub
VulnHubprovidesmaterialsallowinganyonetogainpracticalhands-onexperiencewithdigitalsecurity,computerapplicationsandnetworkadministrationtasks.