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I once had to implement a giant ip address blacklist for an api in the fastest and cheapest way possible. Openresty and redis saved me that day. That has been my favorite project that I've ever worked on. Two amazing pieces of software. Kong is great, too. We were just unable to use it because its blacklist feature wasn't easy to implement.

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Yeah, great stuff from awesome people!

Did not mention it, but of course we used redis to keep track of the rates. :)

What problems did you specifically encounter with the current bundled blacklist plugin?

This was about 3 years ago. We needed to get millions of IP addresses into the blacklist, with daily updates. We tried using Cassandra for the backed. Not sure if it's easier now but yeah that would have been more of a pain to accomplish.

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