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Lecture 19 Hacking

Lecture 19 Hacking. WHAT IS NETWORK SECURITY?. Security is much larger than just packets, firewalls, and hackers. Security includes: Policies and procedures Liabilities and laws Human behavior patterns Corporate security programs and implementation

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Lecture 19 Hacking

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  1. Lecture 19Hacking

  2. WHAT IS NETWORK SECURITY? • Security is much larger than just packets, firewalls, and hackers. Security includes: • Policies and procedures • Liabilities and laws • Human behavior patterns • Corporate security programs and implementation • Technical aspects- firewalls, intrusion detection systems, proxies, encryption, antivirus software, hacks, cracks, and attacks • Understanding hacking tools and how attacks are carried out is only one piece of the puzzle.

  3. ATTACKS • THERE ARE MANY TYPES OF ATTACKS • SPOOFING ATTACK • TELNET BASED ATTACK • DOS (Daniel of service) ATTACK • PING OF DEATH • DISTRIBUTED DOS ATTACK • MAILBOMBS

  4. NEED FOR SECURITY • SOME EXELLENT SOFTWARE CAN PROVIDE YOU BEST SECURITY • LIKE • TROJAN • FIREWALL

  5. TROJAN • WINDOWS TROJANS ARE SMALL ASPECT OF WINDOWS SECURUTY • TROJAN IS UNOTHORIZED PROGRAM CONTAINED WITHIN A LEGIMATE PROGRAM • THIS PROGRAM PERFORMS FUNCTION UNKNOWN BY USER

  6. FIREWALL • FIREWALL IS ANY DEVICE USED TO PREVENT OUTSIDERS FROM GAINING ACCESS TO YOUR NETWORK • TYPES OF FIREWALLS • PACKET FILTER • APPLICATION PROXY • PACKET INSPECTION

  7. Common Steps for Attackers • Reconnaissance • Intelligent work of obtaining information either actively or passively • Examples: • Passively: Sniffing Traffic, eavesdropping • Actively: Obtaining data from American Registry for Internet Numbers (ARIN), whois databases, web sites, social engineering

  8. Common Steps for Attackers • Scanning • Identifying systems that are running and services that are active on them • Examples: Ping sweeps and port scans

  9. Common Steps for Attackers • Gaining Access • Exploiting identified vulnerabilities to gain unauthorized access • Examples: Exploiting a buffer overflow or brute forcing a password and logging onto a system

  10. Common Steps for Attackers • Maintaining Access • Uploading malicious software to ensure re-entry is possible • Example: Installing a backdoor on a system

  11. Common Steps for Attackers • Covering Tracks • Carrying out activities to hide one’s malicious activities • Example: Deleting or modifying data in a system and its application logs

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