Nmap SYN Scan | IHA089 #nmap #linux #cybersecurity #hacking #coding #portscan #cyberhacking

A SYN scan in Nmap is a network scanning technique used to identify open ports on a target system by sending TCP SYN packets to those ports. It is also known as a “half-open” or “stealth” scan because it doesn’t complete the full TCP handshake process but rather initiates the initial part of the handshake.

In a SYN scan, Nmap sends a SYN packet (with the SYN flag set) to each port on the target system.
If the port is open, the target system responds with a SYN-ACK packet.
If the port is closed, the target system responds with a RST (reset) packet, indicating that the port is not open.
If the port is filtered (firewalled), there may be no response at all, or the target system may respond with an ICMP error message.

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