Multithreaded nmap-like scanner in Go

A tool to simply check which ports are open in a host.

Build the tool using go build .. A sample scan be run on scanme.nmap.org using the command gomap -h scanme.nmap.org which will scan the first 1000 ports.

• -h Specify the host to scan.
• -p Give a range of ports to scan or specific ports separated by commas like -p 21,22,80. Default is the first 1000 ports.
• -t Specify timeout(in seconds) to wait for response from each port. Default is 2 seconds.

• Giving documentation to functions and packages.
• Adding service names of more ports.
• Saving the results to a file.
• Issues with appending open ports to slice in a locked area (thread-safe).
• Separate service/port mappings from the code.
• Detect if packets are filtered on a port.
• Using better system of classifying ports during scan than appending to new slice.