Sometime lYou need to know if is the concrete port is opened.
![](https://pepa.holla.cz/wp-content/uploads/2019/12/port.jpg)
Build
go build
Use
./isopened pepa.holla.cz 443 // true ./isopened p1233.holla.cz 80 // false // or go run main.go pepa.holla.cz 443 // true
Public Golang lib
I have published my Golang library: https://github.com/podanypepa/f