"We know that at two different locations in Germany the cables were cut wantonly and deliberately." What an expression of infantility. What will happen next? Germany-wide internet blackout because someone accidentally pulled the power cable from the router?
Thanks for all the downvotes. The point is - how can such a neuralgic facility not be secured? Deutsche Bahn is part of the critical infrastructure - and no one has carried out a vulnerability analysis? No one has thought about how this critical infrastructure can be attacked? According to the newspaper WELT AM SONNTAG, a team of forensic experts is now at work. So it must be a place that can be entered, manipulated…
Your seem to think this a problem of uncontrolled physical access, when it is about redundancy and why cutting so few cables can create a service outage in large parts of north-western germany. Did you know that, by cutting just a few cables, overland lines that are easily accessible, large parts of the USA would have electricity blackouts? That we would need cameras and fences and motion detectors and security checkpoints along thousands of kilometers of cables to secure physical access? Even if we bury them instead of running them overland? As if digging is hard. The problem is not about access to some facility, it is about a lack of redundancy in what should be a network.