Network Mapper (Nmap) is a popular, effective open-source network scanning and inspection tool. It is intended to find hosts and services on a computer network to create a network map. Nmap has a variety of scanning techniques, including TCP, UDP, SYN, ACK, and ICMP scans.
What is a stealth scan?
A stealth scan is a scanning technique in Nmap that seeks to minimize the detection of scanning activity by the target host's firewalls and other security measures.
The default SYN scan is also known as a stealth scan. This is due to the SYN scan failing to complete the
Note: The SYN scan alone does not guarantee perfect stealth mode. To reduce the possibility of notifying the target host, extra flags must be included in combination with the scan.
Syntax
The -sS
flag is used to perform the default SYN scan or stealth scan on target.