All of my ISPs offer a “blackholing” option for me to advertise IPs I want them to block from their routers. I’ve never used this before. JUST FOR CLARIFICATION...
When they provide this feature, it’s to black hole your own IPs (for whatever reason), correct? It’d seem odd / easy to abuse (intentionally or accidentally) to give a customer the ability to blackhole someone else’s IPs from their network.
What is a good use case for why someone would blackhole one of their own IPs?
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