Scan Type | Description |
TCP Connect (-sT) | Full Three-way-handshake (SYN, SYN/ACK, ACK) |
TCP SYN (sS) | Send SYN. RST/ACK response=not listening SYN/ACK=listening |
TCP FIN (sF) | Send FIN, RST response=port close |
TCP Xmas Tree (sX) | Send FIN, URG, PSH, RST response=port closed |
TCP Null (sN) | No Flags. RST response=port closed |
TCP ACK (PT) | Send ACK. Firewall test to verify packet filtering. |