How to detect closed Ports on VPN

If I connect to the AS via VPN, what ports do I need to enable?

I can find the port list in Help [B&R Online Help] (GUID: dc7ec839-7dc0-4292-9f8e-540d20ecb2f7)

I “always” need Ports 80,81,11169.
But then I connect to the customer via VPN and I can’t connect to the machine.
How to verify that the Ports are really open?

I can use “netstat -anop tcp” . It is also possible to add a filter: netstat -anop tcp | find “10.212.33.61” (filter Foreing Address)

Here I see that I connected via SDM (Port 80), Visu(81), but port 11169 is still blocked by IT. So I have to write to the IT to unblock it.

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