open|filtered – nmap cannot determine if a port is open or filtered.unfiltered – the port is accessible however, nmap is unable to determine if it is open or closed.filtered – nmap cannot determine whether the port is open due to packet filtering. closed – accessible however, no application is listening on the port.open – actively accepting TCP connections, UDP datagrams or SCTP associations.Nmap is an efficient port scanner that recognizes six port states: The following command scans the entire specified subnet: sudo nmap 185.52.53.0/24 Port Scanning with Nmap Instead of scanning individual IPs, scan a whole IP range by defining it in your command line: sudo nmap 185.52.53.2-222 To obtain general information of a remote system type: sudo nmap target_IP or Note: It is important to emphasize that aggressive port scanning to find open ports without permission can be interpreted as malicious by third-party organizations.
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