Linux Security Cookbook

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Spis treści ebooka

• Linux Security Cookbook
• Preface
  • A Cookbook About Security?!?
  • Intended Audience
  • Roadmap of the Book
  • Our Security Philosophy
  • Supported Linux Distributions
  • Trying the Recipes
  • Conventions Used in This Book
  • Wed Like to Hear from You
  • Acknowledgments
• 1. System Snapshots with Tripwire
  • 1.1. Setting Up Tripwire
    • 1.1.1. Problem
    • 1.1.2. Solution
    • 1.1.3. Discussion
    • 1.1.4. See Also
  • 1.2. Displaying the Policy and Configuration
    • 1.2.1. Problem
    • 1.2.2. Solution
    • 1.2.3. Discussion
    • 1.2.4. See Also
  • 1.3. Modifying the Policy and Configuration
    • 1.3.1. Problem
    • 1.3.2. Solution
    • 1.3.3. Discussion
    • 1.3.4. See Also
  • 1.4. Basic Integrity Checking
    • 1.4.1. Problem
    • 1.4.2. Solution
    • 1.4.3. Discussion
    • 1.4.4. See Also
  • 1.5. Read-Only Integrity Checking
    • 1.5.1. Problem
    • 1.5.2. Solution
    • 1.5.3. Discussion
    • 1.5.4. See Also
  • 1.6. Remote Integrity Checking
    • 1.6.1. Problem
    • 1.6.2. Solution
    • 1.6.3. Discussion
    • 1.6.4. See Also
  • 1.7. Ultra-Paranoid Integrity Checking
    • 1.7.1. Problem
    • 1.7.2. Solution
    • 1.7.3. Discussion
    • 1.7.4. See Also
  • 1.8. Expensive, Ultra-Paranoid Security Checking
    • 1.8.1. Problem
    • 1.8.2. Solution
    • 1.8.3. Discussion
  • 1.9. Automated Integrity Checking
    • 1.9.1. Problem
    • 1.9.2. Solution
    • 1.9.3. Discussion
    • 1.9.4. See Also
  • 1.10. Printing the Latest Tripwire Report
    • 1.10.1. Problem
    • 1.10.2. Solution
    • 1.10.3. Discussion
    • 1.10.4. See Also
  • 1.11. Updating the Database
    • 1.11.1. Problem
    • 1.11.2. Solution
    • 1.11.3. Discussion
    • 1.11.4. See Also
  • 1.12. Adding Files to the Database
    • 1.12.1. Problem
    • 1.12.2. Solution
    • 1.12.3. Discussion
    • 1.12.4. See Also
  • 1.13. Excluding Files from the Database
    • 1.13.1. Problem
    • 1.13.2. Solution
    • 1.13.3. Discussion
    • 1.13.4. See Also
  • 1.14. Checking Windows VFAT Filesystems
    • 1.14.1. Problem
    • 1.14.2. Solution
    • 1.14.3. Discussion
    • 1.14.4. See Also
  • 1.15. Verifying RPM-Installed Files
    • 1.15.1. Problem
    • 1.15.2. Solution
    • 1.15.3. Discussion
    • 1.15.4. See Also
  • 1.16. Integrity Checking with rsync
    • 1.16.1. Problem
    • 1.16.2. Solution
    • 1.16.3. Discussion
    • 1.16.4. See Also
  • 1.17. Integrity Checking Manually
    • 1.17.1. Problem
    • 1.17.2. Solution
    • 1.17.3. Discussion
    • 1.17.4. See Also
• 2. Firewalls with iptables and ipchains
  • 2.1. Enabling Source Address Verification
    • 2.1.1. Problem
    • 2.1.2. Solution
    • 2.1.3. Discussion
    • 2.1.4. See Also
  • 2.2. Blocking Spoofed Addresses
    • 2.2.1. Problem
    • 2.2.2. Solution
    • 2.2.3. Discussion
    • 2.2.4. See Also
  • 2.3. Blocking All Network Traffic
    • 2.3.1. Problem
    • 2.3.2. Solution
    • 2.3.3. Discussion
    • 2.3.4. See Also
  • 2.4. Blocking Incoming Traffic
    • 2.4.1. Problem
    • 2.4.2. Solution
    • 2.4.3. Discussion
    • 2.4.4. See Also
  • 2.5. Blocking Outgoing Traffic
    • 2.5.1. Problem
    • 2.5.2. Solution
    • 2.5.3. Discussion
    • 2.5.4. See Also
  • 2.6. Blocking Incoming Service Requests
    • 2.6.1. Problem
    • 2.6.2. Solution
    • 2.6.3. Discussion
    • 2.6.4. See Also
  • 2.7. Blocking Access from a Remote Host
    • 2.7.1. Problem
    • 2.7.2. Solution
    • 2.7.3. Discussion
    • 2.7.4. See Also
  • 2.8. Blocking Access to a Remote Host
    • 2.8.1. Problem
    • 2.8.2. Solution
    • 2.8.3. Discussion
    • 2.8.4. See Also
  • 2.9. Blocking Outgoing Access to All Web Servers on a Network
    • 2.9.1. Problem
    • 2.9.2. Solution
    • 2.9.3. Discussion
    • 2.9.4. See Also
  • 2.10. Blocking Remote Access, but Permitting Local
    • 2.10.1. Problem
    • 2.10.2. Solution
    • 2.10.3. Discussion
    • 2.10.4. See Also
  • 2.11. Controlling Access by MAC Address
    • 2.11.1. Problem
    • 2.11.2. Solution
    • 2.11.3. Discussion
    • 2.11.4. See Also
  • 2.12. Permitting SSH Access Only
    • 2.12.1. Problem
    • 2.12.2. Solution
    • 2.12.3. Discussion
    • 2.12.4. See Also
  • 2.13. Prohibiting Outgoing Telnet Connections
    • 2.13.1. Problem
    • 2.13.2. Solution
    • 2.13.3. Discussion
    • 2.13.4. See Also
  • 2.14. Protecting a Dedicated Server
    • 2.14.1. Problem
    • 2.14.2. Solution
    • 2.14.3. Discussion
    • 2.14.4. See Also
  • 2.15. Preventing pings
    • 2.15.1. Problem
    • 2.15.2. Solution
    • 2.15.3. Discussion
    • 2.15.4. See Also
  • 2.16. Listing Your Firewall Rules
    • 2.16.1. Problem
    • 2.16.2. Solution
    • 2.16.3. Discussion
    • 2.16.4. See Also
  • 2.17. Deleting Firewall Rules
    • 2.17.1. Problem
    • 2.17.2. Solution
    • 2.17.3. Discussion
    • 2.17.4. See Also
  • 2.18. Inserting Firewall Rules
    • 2.18.1. Problem
    • 2.18.2. Solution
    • 2.18.3. Discussion
    • 2.18.4. See Also
  • 2.19. Saving a Firewall Configuration
    • 2.19.1. Problem
    • 2.19.2. Solution
    • 2.19.3. Discussion
    • 2.19.4. See Also
  • 2.20. Loading a Firewall Configuration
    • 2.20.1. Problem
    • 2.20.2. Solution
    • 2.20.3. Discussion
    • 2.20.4. See Also
  • 2.21. Testing a Firewall Configuration
    • 2.21.1. Problem
    • 2.21.2. Solution
    • 2.21.3. Discussion
    • 2.21.4. See Also
  • 2.22. Building Complex Rule Trees
    • 2.22.1. Problem
    • 2.22.2. Solution
    • 2.22.3. Discussion
    • 2.22.4. See Also
  • 2.23. Logging Simplified
    • 2.23.1. Problem
    • 2.23.2. Solution
    • 2.23.3. Discussion
    • 2.23.4. See Also
• 3. Network Access Control
  • 3.1. Listing Your Network Interfaces
    • 3.1.1. Problem
    • 3.1.2. Solution
    • 3.1.3. Discussion
    • 3.1.4. See Also
  • 3.2. Starting and Stopping the Network Interface
    • 3.2.1. Problem
    • 3.2.2. Solution
    • 3.2.3. Discussion
    • 3.2.4. See Also
  • 3.3. Enabling/Disabling a Service (xinetd)
    • 3.3.1. Problem
    • 3.3.2. Solution
    • 3.3.3. Discussion
    • 3.3.4. See Also
  • 3.4. Enabling/Disabling a Service (inetd)
    • 3.4.1. Problem
    • 3.4.2. Solution
    • 3.4.3. Discussion
    • 3.4.4. See Also
  • 3.5. Adding a New Service (xinetd)
    • 3.5.1. Problem
    • 3.5.2. Solution
    • 3.5.3. Discussion
    • 3.5.4. See Also
  • 3.6. Adding a New Service (inetd)
    • 3.6.1. Problem
    • 3.6.2. Solution
    • 3.6.3. Discussion
    • 3.6.4. See Also
  • 3.7. Restricting Access by Remote Users
    • 3.7.1. Problem
    • 3.7.2. Solution
    • 3.7.3. Discussion
    • 3.7.4. See Also
  • 3.8. Restricting Access by Remote Hosts (xinetd)
    • 3.8.1. Problem
    • 3.8.2. Solution
    • 3.8.3. Discussion
    • 3.8.4. See Also
  • 3.9. Restricting Access by Remote Hosts (xinetd with libwrap)
    • 3.9.1. Problem
    • 3.9.2. Solution
    • 3.9.3. Discussion
    • 3.9.4. See Also
  • 3.10. Restricting Access by Remote Hosts (xinetd with tcpd)
    • 3.10.1. Problem
    • 3.10.2. Solution
    • 3.10.3. Discussion
    • 3.10.4. See Also
  • 3.11. Restricting Access by Remote Hosts (inetd)
    • 3.11.1. Problem
    • 3.11.2. Solution
    • 3.11.3. Discussion
    • 3.11.4. See Also
  • 3.12. Restricting Access by Time of Day
    • 3.12.1. Problem
    • 3.12.2. Solution
    • 3.12.3. Discussion
    • 3.12.4. See Also
  • 3.13. Restricting Access to an SSH Server by Host
    • 3.13.1. Problem
    • 3.13.2. Solution
    • 3.13.3. Discussion
    • 3.13.4. See Also
  • 3.14. Restricting Access to an SSH Server by Account
    • 3.14.1. Problem
    • 3.14.2. Solution
    • 3.14.3. Discussion
    • 3.14.4. See Also
  • 3.15. Restricting Services to Specific Filesystem Directories
    • 3.15.1. Problem
    • 3.15.2. Solution
    • 3.15.3. Discussion
    • 3.15.4. See Also
  • 3.16. Preventing Denial of Service Attacks
    • 3.16.1. Problem
    • 3.16.2. Solution
    • 3.16.3. Discussion
    • 3.16.4. See Also
  • 3.17. Redirecting to Another Socket
    • 3.17.1. Problem
    • 3.17.2. Solution
    • 3.17.3. Discussion
    • 3.17.4. See Also
  • 3.18. Logging Access to Your Services
    • 3.18.1. Problem
    • 3.18.2. Solution
    • 3.18.3. Discussion
    • 3.18.4. See Also
  • 3.19. Prohibiting root Logins on Terminal Devices
    • 3.19.1. Problem
    • 3.19.2. Solution
    • 3.19.3. Discussion
    • 3.19.4. See Also
• 4. Authentication Techniques and Infrastructures
  • 4.1. Creating a PAM-Aware Application
    • 4.1.1. Problem
    • 4.1.2. Solution
    • 4.1.3. Discussion
    • 4.1.4. See Also
  • 4.2. Enforcing Password Strength with PAM
    • 4.2.1. Problem
    • 4.2.2. Solution
    • 4.2.3. Discussion
    • 4.2.4. See Also
  • 4.3. Creating Access Control Lists with PAM
    • 4.3.1. Problem
    • 4.3.2. Solution
    • 4.3.3. Discussion
    • 4.3.4. See Also
  • 4.4. Validating an SSL Certificate
    • 4.4.1. Problem
    • 4.4.2. Solution
    • 4.4.3. Discussion
    • 4.4.4. See Also
  • 4.5. Decoding an SSL Certificate
    • 4.5.1. Problem
    • 4.5.2. Solution
    • 4.5.3. Discussion
    • 4.5.4. See Also
  • 4.6. Installing a New SSL Certificate
    • 4.6.1. Problem
    • 4.6.2. Solution
    • 4.6.3. Discussion
    • 4.6.4. See Also
  • 4.7. Generating an SSL Certificate Signing Request (CSR)
    • 4.7.1. Problem
    • 4.7.2. Solution
    • 4.7.3. Discussion
    • 4.7.4. See Also
  • 4.8. Creating a Self-Signed SSL Certificate
    • 4.8.1. Problem
    • 4.8.2. Solution
    • 4.8.3. Discussion
    • 4.8.4. See Also
  • 4.9. Setting Up a Certifying Authority
    • 4.9.1. Problem
    • 4.9.2. Solution
    • 4.9.3. Discussion
    • 4.9.4. See Also
  • 4.10. Converting SSL Certificates from DER to PEM
    • 4.10.1. Problem
    • 4.10.2. Solution
    • 4.10.3. Discussion
    • 4.10.4. See Also
  • 4.11. Getting Started with Kerberos
    • 4.11.1. Problem
    • 4.11.2. Solution
    • 4.11.3. Discussion
    • 4.11.4. See Also
  • 4.12. Adding Users to a Kerberos Realm
    • 4.12.1. Problem
    • 4.12.2. Solution
    • 4.12.3. Discussion
    • 4.12.4. See Also
  • 4.13. Adding Hosts to a Kerberos Realm
    • 4.13.1. Problem
    • 4.13.2. Solution
    • 4.13.3. Discussion
    • 4.13.4. See Also
  • 4.14. Using Kerberos with SSH
    • 4.14.1. Problem
    • 4.14.2. Solution
    • 4.14.3. Discussion
    • 4.14.4. See Also
  • 4.15. Using Kerberos with Telnet
    • 4.15.1. Problem
    • 4.15.2. Solution
    • 4.15.3. Discussion
    • 4.15.4. See Also
  • 4.16. Securing IMAP with Kerberos
    • 4.16.1. Problem
    • 4.16.2. Solution
    • 4.16.3. Discussion
    • 4.16.4. See Also
  • 4.17. Using Kerberos with PAM for System-Wide Authentication
    • 4.17.1. Problem
    • 4.17.2. Solution
    • 4.17.3. Discussion
    • 4.17.4. See Also
• 5. Authorization Controls
  • 5.1. Running a root Login Shell
    • 5.1.1. Problem
    • 5.1.2. Solution
    • 5.1.3. Discussion
    • 5.1.4. See Also
  • 5.2. Running X Programs as root
    • 5.2.1. Problem
    • 5.2.2. Solution
    • 5.2.3. Discussion
    • 5.2.4. See Also
  • 5.3. Running Commands as Another User via sudo
    • 5.3.1. Problem
    • 5.3.2. Solution
    • 5.3.3. Discussion
    • 5.3.4. See Also
  • 5.4. Bypassing Password Authentication in sudo
    • 5.4.1. Problem
    • 5.4.2. Solution
    • 5.4.3. Discussion
    • 5.4.4. See Also
  • 5.5. Forcing Password Authentication in sudo
    • 5.5.1. Problem
    • 5.5.2. Solution
    • 5.5.3. Discussion
    • 5.5.4. See Also
  • 5.6. Authorizing per Host in sudo
    • 5.6.1. Problem
    • 5.6.2. Solution
    • 5.6.3. Discussion
    • 5.6.4. See Also
  • 5.7. Granting Privileges to a Group via sudo
    • 5.7.1. Problem
    • 5.7.2. Solution
    • 5.7.3. See Also
  • 5.8. Running Any Program in a Directory via sudo
    • 5.8.1. Problem
    • 5.8.2. Solution
    • 5.8.3. See Also
  • 5.9. Prohibiting Command Arguments with sudo
    • 5.9.1. Problem
    • 5.9.2. Solution
    • 5.9.3. Discussion
    • 5.9.4. See Also
  • 5.10. Sharing Files Using Groups
    • 5.10.1. Problem
    • 5.10.2. Solution
    • 5.10.3. Discussion
    • 5.10.4. See Also
  • 5.11. Permitting Read-Only Access to a Shared File via sudo
    • 5.11.1. Problem
    • 5.11.2. Solution
    • 5.11.3. Discussion
    • 5.11.4. See Also
  • 5.12. Authorizing Password Changes via sudo
    • 5.12.1. Problem
    • 5.12.2. Solution
    • 5.12.3. Discussion
    • 5.12.4. See Also
  • 5.13. Starting/Stopping Daemons via sudo
    • 5.13.1. Problem
    • 5.13.2. Solution
    • 5.13.3. Discussion
    • 5.13.4. See Also
  • 5.14. Restricting roots Abilities via sudo
    • 5.14.1. Problem
    • 5.14.2. Solution
    • 5.14.3. Discussion
    • 5.14.4. See Also
  • 5.15. Killing Processes via sudo
    • 5.15.1. Problem
    • 5.15.2. Solution
    • 5.15.3. Discussion
    • 5.15.4. See Also
  • 5.16. Listing sudo Invocations
    • 5.16.1. Problem
    • 5.16.2. Solution
    • 5.16.3. Discussion
    • 5.16.4. See Also
  • 5.17. Logging sudo Remotely
    • 5.17.1. Problem
    • 5.17.2. Solution
    • 5.17.3. Discussion
    • 5.17.4. See Also
  • 5.18. Sharing root Privileges via SSH
    • 5.18.1. Problem
    • 5.18.2. Solution
    • 5.18.3. Discussion
    • 5.18.4. See Also
  • 5.19. Running root Commands via SSH
    • 5.19.1. Problem
    • 5.19.2. Solution
    • 5.19.3. Discussion
    • 5.19.4. See Also
  • 5.20. Sharing root Privileges via Kerberos su
    • 5.20.1. Problem
    • 5.20.2. Solution
    • 5.20.3. Discussion
      • 5.20.3.1. Authentication
      • 5.20.3.2. Authorization
    • 5.20.4. See Also
• 6. Protecting Outgoing Network Connections
  • 6.1. Logging into a Remote Host
    • 6.1.1. Problem
    • 6.1.2. Solution
    • 6.1.3. Discussion
    • 6.1.4. See Also
  • 6.2. Invoking Remote Programs
    • 6.2.1. Problem
    • 6.2.2. Solution
    • 6.2.3. Discussion
    • 6.2.4. See Also
  • 6.3. Copying Files Remotely
    • 6.3.1. Problem
    • 6.3.2. Solution
    • 6.3.3. Discussion
    • 6.3.4. See Also
  • 6.4. Authenticating by Public Key (OpenSSH)
    • 6.4.1. Problem
    • 6.4.2. Solution
    • 6.4.3. Discussion
    • 6.4.4. See Also
  • 6.5. Authenticating by Public Key (OpenSSH Client, SSH2 Server, OpenSSH Key)
    • 6.5.1. Problem
    • 6.5.2. Solution
    • 6.5.3. Discussion
    • 6.5.4. See Also
  • 6.6. Authenticating by Public Key (OpenSSH Client, SSH2 Server, SSH2 Key)
    • 6.6.1. Problem
    • 6.6.2. Solution
    • 6.6.3. Discussion
    • 6.6.4. See Also
  • 6.7. Authenticating by Public Key (SSH2 Client, OpenSSH Server)
    • 6.7.1. Problem
    • 6.7.2. Solution
    • 6.7.3. Description
    • 6.7.4. See Also
  • 6.8. Authenticating by Trusted Host
    • 6.8.1. Problem
    • 6.8.2. Solution
    • 6.8.3. Discussion
    • 6.8.4. See Also
  • 6.9. Authenticating Without a Password (Interactively)
    • 6.9.1. Problem
    • 6.9.2. Solution
    • 6.9.3. Discussion
    • 6.9.4. See Also
  • 6.10. Authenticating in cron Jobs
    • 6.10.1. Problem
    • 6.10.2. Solution
    • 6.10.3. Discussion
    • 6.10.4. See Also
  • 6.11. Terminating an SSH Agent on Logout
    • 6.11.1. Problem
    • 6.11.2. Solution
    • 6.11.3. Discussion
    • 6.11.4. See Also
  • 6.12. Tailoring SSH per Host
    • 6.12.1. Problem
    • 6.12.2. Solution
    • 6.12.3. Discussion
    • 6.12.4. See Also
  • 6.13. Changing SSH Client Defaults
    • 6.13.1. Problem
    • 6.13.2. Solution
    • 6.13.3. Discussion
    • 6.13.4. See Also
  • 6.14. Tunneling Another TCP Session Through SSH
    • 6.14.1. Problem
    • 6.14.2. Solution
    • 6.14.3. Discussion
    • 6.14.4. See Also
  • 6.15. Keeping Track of Passwords
    • 6.15.1. Problem
    • 6.15.2. Solution
    • 6.15.3. Discussion
    • 6.15.4. See Also
• 7. Protecting Files
  • 7.1. Using File Permissions
    • 7.1.1. Problem
    • 7.1.2. Solution
    • 7.1.3. Discussion
    • 7.1.4. See Also
  • 7.2. Securing a Shared Directory
    • 7.2.1. Problem
    • 7.2.2. Solution
    • 7.2.3. Discussion
    • 7.2.4. See Also
  • 7.3. Prohibiting Directory Listings
    • 7.3.1. Problem
    • 7.3.2. Solution
    • 7.3.3. Discussion
    • 7.3.4. See Also
  • 7.4. Encrypting Files with a Password
    • 7.4.1. Problem
    • 7.4.2. Solution
    • 7.4.3. Discussion
    • 7.4.4. See Also
  • 7.5. Decrypting Files
    • 7.5.1. Problem
    • 7.5.2. Solution
    • 7.5.3. Discussion
    • 7.5.4. See Also
  • 7.6. Setting Up GnuPG for Public-Key Encryption
    • 7.6.1. Problem
    • 7.6.2. Solution
    • 7.6.3. Discussion
    • 7.6.4. See Also
  • 7.7. Listing Your Keyring
    • 7.7.1. Problem
    • 7.7.2. Solution
    • 7.7.3. Discussion
    • 7.7.4. See Also
  • 7.8. Setting a Default Key
    • 7.8.1. Problem
    • 7.8.2. Solution
    • 7.8.3. Discussion
    • 7.8.4. See Also
  • 7.9. Sharing Public Keys
    • 7.9.1. Problem
    • 7.9.2. Solution
    • 7.9.3. Discussion
    • 7.9.4. See Also
  • 7.10. Adding Keys to Your Keyring
    • 7.10.1. Problem
    • 7.10.2. Solution
    • 7.10.3. Discussion
    • 7.10.4. See Also
  • 7.11. Encrypting Files for Others
    • 7.11.1. Problem
    • 7.11.2. Solution
    • 7.11.3. Discussion
    • 7.11.4. See Also
  • 7.12. Signing a Text File
    • 7.12.1. Problem
    • 7.12.2. Solution
    • 7.12.3. Discussion
    • 7.12.4. See Also
  • 7.13. Signing and Encrypting Files
    • 7.13.1. Problem
    • 7.13.2. Solution
    • 7.13.3. Discussion
    • 7.13.4. See Also
  • 7.14. Creating a Detached Signature File
    • 7.14.1. Problem
    • 7.14.2. Solution
    • 7.14.3. Discussion
    • 7.14.4. See Also
  • 7.15. Checking a Signature
    • 7.15.1. Problem
    • 7.15.2. Solution
    • 7.15.3. Discussion
    • 7.15.4. See Also
  • 7.16. Printing Public Keys
    • 7.16.1. Problem
    • 7.16.2. Solution
    • 7.16.3. Discussion
    • 7.16.4. See Also
  • 7.17. Backing Up a Private Key
    • 7.17.1. Problem
    • 7.17.2. Solution
    • 7.17.3. Discussion
    • 7.17.4. See Also
  • 7.18. Encrypting Directories
    • 7.18.1. Problem
    • 7.18.2. Solution
    • 7.18.3. Discussion
    • 7.18.4. See Also
  • 7.19. Adding Your Key to a Keyserver
    • 7.19.1. Problem
    • 7.19.2. Solution
    • 7.19.3. Discussion
    • 7.19.4. See Also
  • 7.20. Uploading New Signatures to a Keyserver
    • 7.20.1. Problem
    • 7.20.2. Solution
  • 7.21. Obtaining Keys from a Keyserver
    • 7.21.1. Problem
    • 7.21.2. Solution
    • 7.21.3. Discussion
    • 7.21.4. See Also
  • 7.22. Revoking a Key
    • 7.22.1. Problem
    • 7.22.2. Solution
    • 7.22.3. Discussion
    • 7.22.4. See Also
  • 7.23. Maintaining Encrypted Files with Emacs
    • 7.23.1. Problem
    • 7.23.2. Solution
    • 7.23.3. Discussion
    • 7.23.4. See Also
  • 7.24. Maintaining Encrypted Files with vim
    • 7.24.1. Problem
    • 7.24.2. Solution
    • 7.24.3. Discussion
    • 7.24.4. See Also
  • 7.25. Encrypting Backups
    • 7.25.1. Problem
    • 7.25.2. Solution
    • 7.25.3. Discussion
    • 7.25.4. See Also
  • 7.26. Using PGP Keys with GnuPG
    • 7.26.1. Problem
    • 7.26.2. Solution
    • 7.26.3. Discussion
    • 7.26.4. See Also
• 8. Protecting Email
  • 8.1. Encrypted Mail with Emacs
    • 8.1.1. Problem
    • 8.1.2. Solution
    • 8.1.3. Discussion
    • 8.1.4. See Also
  • 8.2. Encrypted Mail with vim
    • 8.2.1. Problem
    • 8.2.2. Solution
    • 8.2.3. Discussion
    • 8.2.4. See Also
  • 8.3. Encrypted Mail with Pine
    • 8.3.1. Problem
    • 8.3.2. Solution
    • 8.3.3. Description
    • 8.3.4. See Also
  • 8.4. Encrypted Mail with Mozilla
    • 8.4.1. Problem
    • 8.4.2. Solution
    • 8.4.3. Discussion
    • 8.4.4. See Also
  • 8.5. Encrypted Mail with Evolution
    • 8.5.1. Problem
    • 8.5.2. Solution
    • 8.5.3. Discussion
    • 8.5.4. See Also
  • 8.6. Encrypted Mail with mutt
    • 8.6.1. Problem
    • 8.6.2. Solution
    • 8.6.3. Discussion
    • 8.6.4. See Also
  • 8.7. Encrypted Mail with elm
    • 8.7.1. Problem
    • 8.7.2. Solution
    • 8.7.3. Discussion
    • 8.7.4. See Also
  • 8.8. Encrypted Mail with MH
    • 8.8.1. Problem
    • 8.8.2. Solution
    • 8.8.3. Discussion
    • 8.8.4. See Also
  • 8.9. Running a POP/IMAP Mail Server with SSL
    • 8.9.1. Problem
    • 8.9.2. Solution
    • 8.9.3. Discussion
    • 8.9.4. See Also
  • 8.10. Testing an SSL Mail Connection
    • 8.10.1. Problem
    • 8.10.2. Solution
    • 8.10.3. Discussion
    • 8.10.4. See Also
  • 8.11. Securing POP/IMAP with SSL and Pine
    • 8.11.1. Problem
    • 8.11.2. Solution
    • 8.11.3. Discussion
    • 8.11.4. See Also
  • 8.12. Securing POP/IMAP with SSL and mutt
    • 8.12.1. Problem
    • 8.12.2. Solution
    • 8.12.3. Discussion
    • 8.12.4. See Also
  • 8.13. Securing POP/IMAP with SSL and Evolution
    • 8.13.1. Problem
    • 8.13.2. Solution
    • 8.13.3. Discussion
    • 8.13.4. See Also
  • 8.14. Securing POP/IMAP with stunnel and SSL
    • 8.14.1. Problem
    • 8.14.2. Solution
    • 8.14.3. Discussion
    • 8.14.4. See Also
  • 8.15. Securing POP/IMAP with SSH
    • 8.15.1. Problem
    • 8.15.2. Solution
    • 8.15.3. Discussion
    • 8.15.4. See Also
  • 8.16. Securing POP/IMAP with SSH and Pine
    • 8.16.1. Problem
    • 8.16.2. Solution
    • 8.16.3. Discussion
    • 8.16.4. See Also
  • 8.17. Receiving Mail Without a Visible Server
    • 8.17.1. Problem
    • 8.17.2. Solution
    • 8.17.3. Discussion
    • 8.17.4. See Also
  • 8.18. Using an SMTP Server from Arbitrary Clients
    • 8.18.1. Problem
    • 8.18.2. Solution
    • 8.18.3. Discussion
    • 8.18.4. See Also
• 9. Testing and Monitoring
  • 9.1. Testing Login Passwords (John the Ripper)
    • 9.1.1. Problem
    • 9.1.2. Solution
    • 9.1.3. Discussion
    • 9.1.4. See Also
  • 9.2. Testing Login Passwords (CrackLib)
    • 9.2.1. Problem
    • 9.2.2. Solution
    • 9.2.3. Discussion
    • 9.2.4. See Also
  • 9.3. Finding Accounts with No Password
    • 9.3.1. Problem
    • 9.3.2. Solution
    • 9.3.3. Discussion
    • 9.3.4. See Also
  • 9.4. Finding Superuser Accounts
    • 9.4.1. Problem
    • 9.4.2. Solution
    • 9.4.3. Discussion
    • 9.4.4. See Also
  • 9.5. Checking for Suspicious Account Use
    • 9.5.1. Problem
    • 9.5.2. Solution
    • 9.5.3. Discussion
    • 9.5.4. See Also
  • 9.6. Checking for Suspicious Account Use, Multiple Systems
    • 9.6.1. Problem
    • 9.6.2. Solution
    • 9.6.3. Discussion
    • 9.6.4. See Also
  • 9.7. Testing Your Search Path
    • 9.7.1. Problem
    • 9.7.2. Solution
    • 9.7.3. Discussion
    • 9.7.4. See Also
  • 9.8. Searching Filesystems Effectively
    • 9.8.1. Problem
    • 9.8.2. Solution
    • 9.8.3. Discussion
    • 9.8.4. See Also
  • 9.9. Finding setuid (or setgid) Programs
    • 9.9.1. Problem
    • 9.9.2. Solution
    • 9.9.3. Discussion
    • 9.9.4. See Also
  • 9.10. Securing Device Special Files
    • 9.10.1. Problem
    • 9.10.2. Solution
    • 9.10.3. Discussion
    • 9.10.4. See Also
  • 9.11. Finding Writable Files
    • 9.11.1. Problem
    • 9.11.2. Solution
    • 9.11.3. Discussion
    • 9.11.4. See Also
  • 9.12. Looking for Rootkits
    • 9.12.1. Problem
    • 9.12.2. Solution
    • 9.12.3. Discussion
    • 9.12.4. See Also
  • 9.13. Testing for Open Ports
    • 9.13.1. Problem
    • 9.13.2. Solution
    • 9.13.3. Discussion
    • 9.13.4. See Also
  • 9.14. Examining Local Network Activities
    • 9.14.1. Problem
    • 9.14.2. Solution
    • 9.14.3. Discussion
    • 9.14.4. See Also
  • 9.15. Tracing Processes
    • 9.15.1. Problem
    • 9.15.2. Solution
    • 9.15.3. Discussion
    • 9.15.4. See Also
  • 9.16. Observing Network Traffic
    • 9.16.1. Problem
    • 9.16.2. Solution
    • 9.16.3. Discussion
    • 9.16.4. See Also
  • 9.17. Observing Network Traffic (GUI)
    • 9.17.1. Problem
    • 9.17.2. Solution
    • 9.17.3. Discussion
    • 9.17.4. See Also
  • 9.18. Searching for Strings in Network Traffic
    • 9.18.1. Problem
    • 9.18.2. Solution
    • 9.18.3. Discussion
    • 9.18.4. See Also
  • 9.19. Detecting Insecure Network Protocols
    • 9.19.1. Problem
    • 9.19.2. Solution
    • 9.19.3. Discussion
    • 9.19.4. See Also
  • 9.20. Getting Started with Snort
    • 9.20.1. Problem
    • 9.20.2. Solution
    • 9.20.3. Discussion
    • 9.20.4. See Also
  • 9.21. Packet Sniffing with Snort
    • 9.21.1. Problem
    • 9.21.2. Solution
    • 9.21.3. Discussion
    • 9.21.4. See Also
  • 9.22. Detecting Intrusions with Snort
    • 9.22.1. Problem
    • 9.22.2. Solution
    • 9.22.3. Discussion
    • 9.22.4. See Also
  • 9.23. Decoding Snort Alert Messages
    • 9.23.1. Problem
    • 9.23.2. Solution
    • 9.23.3. Discussion
    • 9.23.4. See Also
  • 9.24. Logging with Snort
    • 9.24.1. Problem
    • 9.24.2. Solution
    • 9.24.3. Discussion
    • 9.24.4. See Also
  • 9.25. Partitioning Snort Logs Into Separate Files
    • 9.25.1. Problem
    • 9.25.2. Solution
    • 9.25.3. Discussion
    • 9.25.4. See Also
  • 9.26. Upgrading and Tuning Snorts Ruleset
    • 9.26.1. Problem
    • 9.26.2. Solution
    • 9.26.3. Discussion
    • 9.26.4. See Also
  • 9.27. Directing System Messages to Log Files (syslog)
    • 9.27.1. Problem
    • 9.27.2. Solution
    • 9.27.3. Discussion
    • 9.27.4. See Also
  • 9.28. Testing a syslog Configuration
    • 9.28.1. Problem
    • 9.28.2. Solution
    • 9.28.3. Discussion
    • 9.28.4. See Also
  • 9.29. Logging Remotely
    • 9.29.1. Problem
    • 9.29.2. Solution
    • 9.29.3. Discussion
    • 9.29.4. See Also
  • 9.30. Rotating Log Files
    • 9.30.1. Problem
    • 9.30.2. Solution
    • 9.30.3. Discussion
    • 9.30.4. See Also
  • 9.31. Sending Messages to the System Logger
    • 9.31.1. Problem
    • 9.31.2. Solution
    • 9.31.3. Discussion
    • 9.31.4. See Also
  • 9.32. Writing Log Entries via Shell Scripts
    • 9.32.1. Problem
    • 9.32.2. Solution
    • 9.32.3. Discussion
    • 9.32.4. See Also
  • 9.33. Writing Log Entries via Perl
    • 9.33.1. Problem
    • 9.33.2. Solution
    • 9.33.3. Discussion
    • 9.33.4. See Also
  • 9.34. Writing Log Entries via C
    • 9.34.1. Problem
    • 9.34.2. Solution
    • 9.34.3. Discussion
    • 9.34.4. See Also
  • 9.35. Combining Log Files
    • 9.35.1. Problem
    • 9.35.2. Solution
    • 9.35.3. Discussion
    • 9.35.4. See Also
  • 9.36. Summarizing Your Logs with logwatch
    • 9.36.1. Problem
    • 9.36.2. Solution
    • 9.36.3. Discussion
    • 9.36.4. See Also
  • 9.37. Defining a logwatch Filter
    • 9.37.1. Problem
    • 9.37.2. Solution
    • 9.37.3. Discussion
    • 9.37.4. See Also
  • 9.38. Monitoring All Executed Commands
    • 9.38.1. Problem
    • 9.38.2. Solution
    • 9.38.3. Discussion
    • 9.38.4. See Also
  • 9.39. Displaying All Executed Commands
    • 9.39.1. Problem
    • 9.39.2. Solution
    • 9.39.3. Discussion
    • 9.39.4. See Also
  • 9.40. Parsing the Process Accounting Log
    • 9.40.1. Problem
    • 9.40.2. Solution
    • 9.40.3. Discussion
    • 9.40.4. See Also
  • 9.41. Recovering from a Hack
    • 9.41.1. Problem
    • 9.41.2. Solution
    • 9.41.3. Discussion
    • 9.41.4. See Also
  • 9.42. Filing an Incident Report
    • 9.42.1. Problem
    • 9.42.2. Solution
    • 9.42.3. Discussion
    • 9.42.4. See Also
• Index
• About the Authors
• Colophon
• Copyright

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