ZeroMQ is amazing. A few years ago I built a prototype project for a client that basically was fail2ban but scalable. It monitored nginx logs and broadcasted some information, and workers did the rest. Most of the data was in memory and passed around, and communication was done via ZeroMQ. It was done this way so that we could split the heavy-load components off the server and into workers, and allow the server to simply do it's job: tail nginx logs and act upon ban requests from workers. It was amazing, sadly I never completed it and deployed it on a production environment but from initial tests, it outperformed fail2ban by a lot.
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ZeroMQ is amazing. A few years ago I built a prototype project for a client that basically was fail2ban but scalable. It monitored nginx logs and broadcasted some information, and workers did the rest. Most of the data was in memory and passed around, and communication was done via ZeroMQ. It was done this way so that we could split the heavy-load components off the server and into workers, and allow the server to simply do it's job: tail nginx logs and act upon ban requests from workers. It was amazing, sadly I never completed it and deployed it on a production environment but from initial tests, it outperformed fail2ban by a lot.