March 2018
Intermediate to advanced
626 pages
17h 32m
English
book
Network Analysis Using Wireshark 2 Cookbook - Second Edition
by Nagendra Kumar Nainar, Yoram Orzach, Yogesh Ramdoss
Content preview from Network Analysis Using Wireshark 2 Cookbook - Second Edition
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How it works...
The majority of scanners work in several steps: ARP scanning, ICMP, and then TCP or UDP. The principle is simple:
- If the scanner is on the LAN, it sends an ARP broadcast to the entire LAN.
- The scanner sends ICMP requests. Some of the ICMP requests will be answered.
- When someone answers the ARP or ICMP request, it goes up to TCP and UDP and starts scanning the layer 4 ports. When the scanner finds out that a port is open, it starts with application scanning.
- In application scanning, the scanner sends commands to the applications, trying to get the application to answer, and, in this way, trying to break into it.
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