Core

Linux permissions and hardening, Windows and Active Directory, privilege escalation and authentication.

1. 01Linux security modelUsers, permissions, SUID, and the hardening basics: the operating system you'll meet most in CTFs and on servers.~4 min read
2. 02Windows and Active DirectoryThe Windows security model, Active Directory, and the credential attacks that dominate enterprise compromise.~4 min read
3. 03Authentication and identityAuthentication factors, MFA, password attacks, and the access-control models (DAC, MAC, RBAC, ABAC) and SSO protocols.~4 min read