Footprinting & Scanning¶

ACTIVE INFORMATION GATHERING¶
This is going to be more of Nmap!¶


Networking Primer¶



OSI LAYER (Open System Interconnection)¶

Network Layer¶







IPv4 Header Format¶
- IHL - Header Length

1 byte = 8 bits

First Octet / Second Octet and so on...

Practical Implementation of the OSI Layer: Via Wireshark¶
Network Layer: IP Header Analysis

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


TCP - Connection-Oriented
UDP - Connectionless
TCP - Connection-Oriented¶



Common TCP/UDP Ports Reference





UDP - Connectionless¶


Difference TCP/UDP¶

PRACTICAL IMPLEMENTATION¶
netstat -antp
HOST DISCOVERY¶

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





Nmap (Network Mapper)¶


Host Discovery Techniques¶


