Is there a way to check if a VPN connection is working without actually trying to connect to an external system?

I have a VPN tunnel setup on the environment. Now when I try to connect to an external system I get an error saying "It could not connect to the specified host and port". String and credentials are correct as they have been verified outside of Appian. But besides that, there is not much I can do besides asking Appian to check for me. Is there a way to look into this issue myself? Is there a way to check for the proper working of the VPN tunnels?

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