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One good way to detect loss is by using a UDP stream of packets (there are various tools that do this, mainly for QoS testing). You can vary size, frequency, delay. It should show you if you have actual loss.


You can't. Available address ranges change frequently, and while whois can provide you with some hints, it isn't going to get you close to something you can just fire-and-forget. IP-based restrictions aren't an effective security tool anyway. You're far better to implement rate-limiting (to protect against brute-force attacks) and keep your services ...

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