Hello,
I have spent the last several days trying to understand subnetmasks in an effort to block ip address ranges. Unfortunately, I am finding it very difficult to understand the subnetmask concept, and fear that the learning curve is unrealistic for my rather straightforward objective.
What I need to do is quite simple: I would like to block all traffic except to a handful of external ip addresses.
Is there an uncomplicated way to do this in Astaro without having an understanding of subnetmasks?
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