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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.


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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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