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Guides for Sysadmins

• Best Practices For Securing IT Resources
• Disable Autorun
• Hashing the OpenSSH known_hosts file
• Post Install Package Verification
• Preventing Mail Relay Abuse
• Protecting IIS
• Restricting Access to Windows Computers
• Securing inetd
• SSH Installation and Use
• TCP Wrappers
• You Don't Need Root for That

Here are some other useful guides from sites external to the ITSO:

• Steps for Recovering from a UNIX or NT System Compromise
• At IU, how do I obtain an SSL certificate for my web server?
• Security Configuration Guides from the National Security Agency
• Best Practice Guide Library from the Forum of Incident Response and Security Teams (FIRST)
• Securing Mac OS X (PDF)
• Security Technical Implementation Guides (STIGs) from the National Institute of Standards and Technology (NIST)