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Footprinting & Scanning

Footprinting Overview

ACTIVE INFORMATION GATHERING

This is going to be more of Nmap!

Nmap Overview

Nmap Basics

Networking Primer

Network Basics 1

Network Basics 2

Network Basics 3

OSI LAYER (Open System Interconnection)

OSI Model

Network Layer

Network Layer 1

Network Layer 2

Network Layer 3

Network Layer 4

Network Layer 5

Network Layer 6

Network Layer 7

IPv4 Header Format

  • IHL - Header Length

IPv4 Header

1 byte = 8 bits

Byte Structure

First Octet / Second Octet and so on...

Octet Structure

Practical Implementation of the OSI Layer: Via Wireshark

Network Layer: IP Header Analysis

Wireshark Analysis

  • Frame: Physical Layer
  • Ethernet II: Data Link Layer
  • Layer 3 / Network Layer - IP, ICMP
  • Transport Layer - TCP/UDP

Transport Layer

Transport Layer 1

Transport Layer 2

TCP - Connection-Oriented

UDP - Connectionless

TCP - Connection-Oriented

TCP 1

TCP 2

TCP 3

Common TCP/UDP Ports Reference

TCP 4

TCP 5

TCP 6

TCP 7

TCP 8

UDP - Connectionless

UDP 1

UDP 2

Difference TCP/UDP

TCP vs UDP

PRACTICAL IMPLEMENTATION

netstat -antp

HOST DISCOVERY

Host Discovery 1

It refers to the process of discovering and identifying devices, hosts, and network infrastructure elements within a target network.

Host Discovery 2

Host Discovery 3

Host Discovery 4

Host Discovery 5

Host Discovery 6

Nmap (Network Mapper)

Nmap 1

Nmap 2

Host Discovery Techniques

Host Discovery Techniques 1

Host Discovery Techniques 2

Host Discovery Techniques 3