github.com/giovannyortegon/go@v0.0.0-20220115155912-8890063f5bdd/BlackHatGo/Chap02/tcp-scanner-slow/main.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"net"
     6  )
     7  
     8  func main() {
     9  	for i := 1; i <= 1024; i++ {
    10  		address := fmt.Sprintf("scanme.nmap.org:%d", i)
    11  		conn, err := net.Dial("tcp", address)
    12  		if err != nil {
    13  			// port is closed or filtered
    14  			continue
    15  		}
    16  		conn.Close()
    17  		fmt.Printf("%d open\n", i)
    18  	}
    19  }