Well, sometimes we need to know whether the port in open or block, we need to do some checking or troubleshoot through ping/telnet. We cannot ping a IP with port but we can telnet certain IP together with Port no.
Go to open command prompt, if we want to check whether port 21 is working for IP 220.127.116.11 what we need to do is
> telnet 18.104.22.168 21
please tell me it's work. thanks