This is a simple tool that allows you to see if a remote machine is reachable via ICMP ping as opposed to Java's included TCP method:
InetAddress.getByName(ip).isReachable(timeout);I've noticed some false readings using the above Java API in some instances on windows machines. JPing is intended for Windows machines only since the false reading occures when Port 7 is blocked; thus, ICMP isn't the default method, which is what "ping" uses. If on Mac or Linux, Java's API will work in all circumstances.
The main use for this tool is if you have to bootup or shutdown a network in a particular order (example shutdown sequence: workstations then servers then domain controller then raids then switches). Simply ping each piece of hardware and decide what needs to be done accordingly.
Since the method is static, simply use the following call where host is a string with
the name or IP address of the machine you're trying to reach.
Ping.isReachable(host);If the machine is reachable, it will return true; else it will return false.
This tool executes the ping command piped with find. It basically parses out the ping and looks for TTL. If TTL is present, we know the machine has been reached, else it is not reachable.