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Real World Linux Security: Intrusion Prevention, Detection and Recovery

Real World Linux Security: Intrusion Prevention, Detection and Recovery

          
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About the Book

Cracker attacks are costing leading e-Businesses millions -- and spotlighting the dangers intruders pose to every participant in the new dot-com economy. If you rely on Linux, this is your systematic, comprehensive guide to protecting yourself. Security guru Bob Toxen uses real-world case studies from his own consulting career to show exactly how network and Internet security breaches can happen, what they look like when they do happen, and what you must do now to prevent them. The book is organized into four sections: securing your system, preparing for an intrusion, detecting an intrusion, and recovering from an intrusion. Toxen even provides at-a-glance icons and tables rating the severity and likelihood of each type of attack. Along the way, you'll learn how to configure systems so they alter themselves to lock out a cracker -- and notify the sysadmin immediately -- at the first sign of attack. You'll discover virtually cracker-proof techniques for protecting credit card databases, even if your web server and network are compromised. Toxen also presents 100+ pages of techniques for ensuring that, if a break-in does occur, damage will be minimal and a full recovery can happen fast. The accompanying CD-ROM includes a complete Linux security software library -- including powerful tools written by the author to detect cracker servers, and identify running cracker programs, even if they've been deleted from disk.

Table of Contents:
List of Figures. List of Tables. Foreword. Acknowledgments. About the Author. 1. Introduction. Who Should Read This Book? How This Book Is Organized. What Are You Protecting? Who Are Your Enemies? What They Hope to Accomplish. Costs: Protection versus Break-Ins. Protecting Hardware. Protecting Network and Modem Access. Protecting System Access. Protecting Files. Preparing for and Detecting an Intrusion. Recovering from an Intrusion. I. SECURING YOUR SYSTEM. 2. Quick Fixes for Common Problems. Understanding Linux Security. The Seven Most Deadly Sins. Passwords-A Key Point for Good Security. Advanced Password Techniques. Protecting the System from User Mistakes. Forgiveness Is Better Than Permission. Dangers and Countermeasures During Initial System Setup. Limiting Unreasonable Access. Firewalls and the Corporate Moat. Turn Off Unneeded Services. High Security Requires Minimum Services. Replace These Weak Doors with Brick. New Lamps for Old. United We Fall, Divided We Stand. 3. Quick and Easy Break-Ins and How to Avoid Them. X Marks the Hole. Physical Intrusions. Selected Short Subjects. Terminal Device Attacks. Disk Sniffing. 4. Common Break-Ins by Subsystem. NFS, mountd, and portmap. Sendmail. Telnet. FTP. The rsh, rcp, rexec, and rlogin Services. DNS (named, a.k.a BIND). POP and IMAP Servers. Doing the Samba. Stop Squid from Inking Out Their Trail. The syslogd Service. The print Service (lpd). The ident Service. INND and News. Protecting Your DNS Registration. 5. Common Attacks. Rootkit Attacks (Script Kiddies). Packet Spoofing Explained. SYN Flood Attack Explained. Defeating SYN Flood Attacks. Defeating TCP Sequence Spoofing. Packet Storms, Smurf Attacks, and Fraggles. Buffer Overflows or Stamping on Memory with gets(). Spoofing Techniques. Man in the Middle Attack. 6. Advanced Security Issues. Configuring Netscape for Higher Security. Stopping Access to I/O Devices. Scouting Out Apache (httpd) Problems. Special Techniques for Web Servers. One-Way Credit Card Data Path for Top Security. Hardening for Very High Security. Restricting Login Location and Times. Obscure but Deadly Problems. Defeating Login Simulators. Stopping Buffer Overflows with Libsafe. 7. Establishing Security Policies. General Policy. Personal Use Policy. Accounts Policy. E-Mail Policy. Web Server Policy. File Server and Database Policy. Firewall Policy. Desktop Policy. Laptop Policy. Disposal Policy. Network Topology Policy. Problem Reporting Policy. Ownership Policy. Policy Policy. 8. Trusting Other Computers. Secure Systems and Insecure Systems. Linux and UNIX Systems Within Your Control. Mainframes Within Your Control. A Window Is Worth a Thousand Cannons. Firewall Vulnerabilities. Virtual Private Networks. Viruses and Linux. 9. Gutsy Break-Ins. Mission Impossible Techniques. Spies. Fanatics and Suicide Attacks. 10. Case Studies. Confessions of a Berkeley System Mole. Knights of the Realm (Forensics). Ken Thompson Cracks the Navy. The Virtual Machine Trojan. AOL's DNS Change Fiasco. I'm Innocent, I Tell Ya! Cracking with a Laptop and a Pay Phone. Take a Few Cents off the Top. 11. Recent Break-Ins. Fragmentation Attacks. The Ping of Death Sinks Dutch Shipping Company. Captain, We're Being Scanned!(Stealth Scans). Cable Modems: A Cracker's Dream. Using Sendmail to Block E-Mail Attacks. Sendmail Account Guessing. The Mysterious ingreslock. You're Being Tracked. Distributed Denial of Service (Coordinated) Attacks. Stealth Trojan Horses. Linuxconf via TCP Port. Evil HTML Tags and Script. Format Problems with syslog(). II. PREPARING FOR AN INTRUSION. 12. HardEning Your System. Protecting User Sessions with SSH. PGP (Pretty Good Privacy). FSF's PGP Replacement. Firewalls with IP Chains and DMZ. 13. Preparing Your Hardware. Timing Is Everything. Advanced Preparation. Switch to Auxiliary Control (Hot Backups). TCP Wrappers. Adaptive TCP Wrappers: Raising the Drawbridge. Cracker Trap. Ending Cracker Servers with a Kernel Mod. Fire Drills. Break Into Your Own System with Tiger Teams. 15. Scanning Your Own System. The Nessus Security Scanner. The SARA and SAINT Security Auditors. The nmap Network Mapper. The Snort Attack Detector. Scanning and Analyzing with SHADOW. John the Ripper. Store the RPM Database Checksums. III. DETECTING AN INTRUSION. 16. Monitoring Activity. Log Files. Log Files: Measures and Countermeasures. Paging the SysAdmin: Cracking in Progress! An Example for Automatic Paging. Building on Your Example for Automatic Paging. Paging telnet and rsh Usage. Monitoring Port Usage. Using tcpdump to Monitor Your LAN. Monitoring the Scanners with Deception Took Kit (DTK). Monitoring Processes. Cron: Watching the Crackers. Caller ID. 17. Scanning Your System for Anomalies. Finding Suspicious Files. Tripwire. Detecting Deleted Executables. Detecting Promiscuous Network Interface Cards. Finding Promiscuous Processes. Detecting Defaced Web Pages Automatically. IV. RECOVERING FROM AN INTRUSION. 18. Regaining Control of Your System. Finding the Cracker's Running Processes. Handling Running Cracker Processes. Drop the Modems, Network, Printers, and System. 19. Finding and Repairing the Damage. Check Your /var/log Logs. The syslogd and klogd Daemons. Remote Logging. Interpreting Log File Entries. Check Other Logs. Check TCP Wrapper Responses. How the File System Can Be Damaged. Planting False Data. Altered Monitoring Programs. Stuck in the House of Mirrors. Getting Back in Control. Finding Cracker-Altered Files. Sealing the Crack. Finding set-UID Programs. Finding the mstream Trojan. 20. Finding the Attacker's System. Tracing a Numeric IP Address with nslookup. Tracing a Numeric IP Address with dig. Who's a Commie: Finding .com Owners. Finding Entities Directly from the IP Address. Finding a G-Man: Looking Up .gov Systems. Using ping. Using traceroute. Neighboring Systems' Results. A Recent International Tracking of a Cracker. Be Sure You Found the Attacker. Other SysAdmins: Do They Care? 21. Having the Cracker Crack Rocks. Police: Dragnet or Keystone Kops? Prosecution. Liability of ISPs Allowing Illegal Activity. Counteroffenses. Appendix A: Internet Resources for the Latest Intrustions and Defenses. Mailing Lists-The Mandatory Ones. Mailing Lists-The Optional Ones. News Groups. URLs for Security Sites. URLs for Security Tools. URLs for Documentation. URLs for General Tools. URLs for Specifications and Definitions. Vendor Software and Updates. Other Software Updates. Appendix B: Books, CD-ROMs, and Videos. Linux System Security. Linux Firewalls. Building Linux and Openbsd Firewalls. Samba: Integrating UNIX and Windows. The Cuckoo's Egg. Hackers. UNIX Complete. The Computer Contradictionary. U.S. Department of Defense DISA Resources. Internetworking with TCP/IP Vols I, II, and III. Linux Application Development. Consultants: The Good, the Bad, and the Slick. Appendix C: Network Services and Ports. Appendix D: The ports.c Listing. Appendix E: The blockip.csh Listing. Appendix F: The fpromisc.csh Listing. Appendix G: The overwrite.c Listing. Appendix H: Danger Levels. Appendix I: About the CD-ROM. The Author's GPG Public Key. Appendix J: Glossary. Index.


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Product Details
  • ISBN-13: 9780130281876
  • Publisher: Pearson Education (US)
  • Publisher Imprint: Prentice Hall
  • Height: 235 mm
  • No of Pages: 736
  • Sub Title: Intrusion Prevention, Detection and Recovery
  • Width: 180 mm
  • ISBN-10: 0130281875
  • Publisher Date: 12 Dec 2000
  • Binding: SA
  • Language: English
  • Spine Width: 37 mm
  • Weight: 1186 gr


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