Port scanning

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Connect to a port

Test-NetConnection -Port {{port}} {{ip}}

nc {{ip}} {{port}} 

telnet {{ip}} {{port}}

Scanning ports in a range - [ TCP connect scan ]

nc -nvv -w 1 -z {{ip}} {{port_range}}

{{port_range}} | % {echo ((New-Object Net.Sockets.TcpClient).Connect("{{ip}}", $_)) "TCP port $_ is open"} 2>$null

Replace {{port_range}} with range in pattern 1...65535.

UDP port scan

nc -nv -u -z -w 1 {{ip}} {{port-range}}

A similar local port scan explicitly probing all 65535 ports generated about 4 megabytes of traffic

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Tools :

• CS - Nmap
• rustscan
• masscan