Since the possibilities of what you install in the virtual data center (vDC) are almost endless, we cannot predict what will ultimately happen in all your virtual data centers. Accordingly, you also need a wide variety of ports.
That’s why there is actually no restriction on ports from our side.
Nevertheless, there are a few ports that we completely block for security reasons. These are the following ports.
111,135,137,138,139,445
The justification is based, among other things, on the information provided by the BSI (Federal Office for Information Security in Germany). Here is the relevant link .