Java Port Scanner

Simple port scanner written in Java with parallelization support.

Usage

$ java -jar JavaPortScanner.jar <IPv4> [PortStart-PortEnd]

• <IPv4> is a required parameter that is a valid IPv4 address
• [PortStart-PortEnd] is an optional parameter to indicate certain range of ports to scan
  • If this is empty, scanner will try to scan all possible ports (can take a long time)
  • PortStart-PortEnd will scan from PortStart to PortEnd

Examples

Scanning all possible ports

$ java -jar JavaPortScanner.jar 127.0.0.1
Scanning 127.0.0.1:1-65535
2/65535 were open
80:     open
443:    open

Scanning certain port(s) only

$ java -jar JavaPortScanner.jar 127.0.0.1 80
Scanning 127.0.0.1:80
1/1 were open
80:     open

$ java -jar JavaPortScanner.jar 127.0.0.1 80-81
Scanning 127.0.0.1:80-81
1/2 were open
80:     open