Security

 "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.": Antoine de Saint-Exupery

 ”Security ist Nachdenken über Verantwortung, Risiko und Kosten. Dieses Nachdenken kann einem niemand abnehmen.”: Stephan Pietzko

• SimpleSecurityManifesto
• ITSecurityInaNutshell
• SecurityFrameworksMerged
• RisikoAnalyse
• RisikoLifeCycle
• IsMS
• PkI
• StartWithAPolicy (i.e. trust model) %D% If you have no security policy, you have no security %W%
• SecurityModels
• NIST Cybersecurity Framework
• Top10SecurityTools
• LookAtYourLogs
• SolarisTelnetExploit
• NessusSignPlugin
• nmap %D% A light but powerful network scanner
• metasploit
• PlotHydraLogins
• PeakflowXPassword
• PeakflowXsshQuery
• ForensiC
• DDOS
• TOTP with YubiKey
• SMiME
• PGP
• TnftpVulnerability Checker
• SunCryptoAccelerator6000Board
• DefaultPasswords
• ssh
• Private VLAN
• ApacheSecurity
• SecurityBookmarks
• IsmsFrameworks
• SnowdenLinks
• PlayWithRandomNumbers

• LinPEAS
• Linuxprivchecker.py
• unix-privesc-check
• vuls
• LES: Linux privilege escalation auditing tool
• Lynis

• Very short list of best practices from the US-CERT%E% you don't need much more.

Computer Emergency Response Team (CERT)

• US-CERT%E%
• RUS-CERT%E%
• DFN-CERT%E%
• BUND-CERT%E%
• Buerger CERT%E%

• Security Mailing List Archive%E%
• Searchengine for unsecure Devices%E%
• Reversing Industrial firmware for fun and backdoors I%E%