I have here a dilemma. I have a device that communicates to another remote device but there is a firewall between them. It's a UDP connection, so TCP utilities don't work to test if the specific port is open. I know that we could get that from the firewall but I don't have access so I have to prove that the port is not open.

The source system is a Windows 7 system and the destination system is a appliance running Linux.