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Computer Science
Cybersecurity
Nmap and Network Scanning
1. Fundamentals of Network Communication
2. Introduction to Network Scanning
3. Nmap Fundamentals
4. Host Discovery
5. Core Port Scanning Techniques
6. Service and Version Detection
7. Operating System Detection
8. Advanced Scanning Techniques
9. Timing and Performance Optimization
10. Firewall and IDS Evasion
11. Nmap Scripting Engine (NSE)
12. Output Formats and Analysis
13. Practical Scanning Scenarios
14. Defensive Countermeasures
10.
Firewall and IDS Evasion
10.1.
Evasion Fundamentals
10.1.1.
Detection Mechanisms
10.1.2.
Signature Avoidance
10.1.3.
Behavioral Camouflage
10.2.
Packet Fragmentation (-f)
10.2.1.
IP Fragment Creation
10.2.2.
Fragment Size Control
10.2.3.
Reassembly Challenges
10.3.
Custom MTU (--mtu)
10.3.1.
Maximum Transmission Unit
10.3.2.
Fragment Size Specification
10.3.3.
Network Path Considerations
10.4.
Decoy Scanning (-D)
10.4.1.
Multiple Source IPs
10.4.2.
Decoy Selection Strategies
10.4.3.
Traffic Obfuscation
10.4.4.
Anonymity Considerations
10.5.
Source Port Manipulation
10.5.1.
Source Port Spoofing (-g, --source-port)
10.5.2.
Trusted Port Usage
10.5.3.
Firewall Rule Bypass
10.6.
Data Padding
10.6.1.
Random Data Appending (--data-length)
10.6.2.
Packet Size Variation
10.6.3.
Signature Disruption
10.7.
IP Options Manipulation
10.7.1.
Record Route (--ip-options RR)
10.7.2.
Loose Source Routing (--ip-options L)
10.7.3.
Strict Source Routing (--ip-options S)
10.7.4.
Timestamp Option (--ip-options T)
10.8.
MAC Address Spoofing (--spoof-mac)
10.8.1.
Source MAC Modification
10.8.2.
Local Network Evasion
10.8.3.
Switch Table Manipulation
10.9.
Protocol-Specific Evasion
10.9.1.
TCP Flag Manipulation
10.9.2.
Sequence Number Randomization
10.9.3.
Window Size Variation
10.10.
Timing-Based Evasion
10.10.1.
Slow Scanning
10.10.2.
Random Delays
10.10.3.
Traffic Pattern Disruption
10.11.
Advanced Evasion Techniques
10.11.1.
Proxy Chains
10.11.2.
Tor Network Usage
10.11.3.
VPN Tunneling
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9. Timing and Performance Optimization
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11. Nmap Scripting Engine (NSE)