I have many computers deployed out there each are using different ISPs. I'd like to be able to test to see if they can reach my vpn concentrator on port 443 from their firewall with a simple script.
I found this for udp port but it doesn't seem to be working;
http://serverfault.com/questions/262474/how-to-check-that-an-openvpn-server-is-listening-on-a-remote-port-without-using
