Scanning is the process of sending packets to network devices in order to see who is answering the ping requests, to look for listening TCP/UDP ports, and to find out which types of resources are shared on the network, including system and application resources.
Discovering ICMP and TCP SYN/port scans
Getting ready
A scanning attack is usually detected by users complaining about slow network responses, by management systems that discover an unusual load on servers or communication lines, or when the attack is implemented by Security Information and Event Management Systems (SIEM) that identify suspicious usage patterns. In these cases, locate the Wireshark with a port-mirror as close as possible to the area that you suspect...
