Challenges completed
Completed nmap host discovery room
What I learned
-
Refreshed knowledge around OSI layers, and what protocols, such as ARP, TCP, UDP, ICMP belongs in what layer
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Host discoverying using:
- ARP
- ICMP
- TCP and UDP
-
Reverse DNS look up
Commands, tools, and techniques
- host discovery only: -sn
- ARP Scan - sudo nmap -PR -sn 10.200.6.0/24
- ICMP Echo Scan - sudo nmap -PE -sn 10.200.6.0/24
- ICMP Timestamp Scan - sudo nmap -PP -sn 10.200.6.0/24
- ICMP Address Mask Scan - sudo nmap -PM -sn 10.200.6.0/24
- TCP SYN Ping Scan - sudo nmap -PS22,80,443 -sn 10.200.6.0/30
- TCP ACK Ping Scan - sudo nmap -PA22,80,443 -sn 10.200.6.0/30
- UDP Ping Scan - sudo nmap -PU53,161,162 -sn 10.200.6.0/30
- no DNS look up: -n
- reverse DNS look up: -R
Problems and dead ends
Explain what did not work and why.
What I will revisit
- Subnets