Are you worried about your server being brute force cracked? Are you still worried that frequent malicious requests will make your service unavailable? Today, I bring you an open source protection tool "Fail2ban", which will help you sleep soundly. The reason is that I have opened a public IP address in my home, which maps an intranet Linux machine to the outside, so that I can access my home from outside. Today, when I look at the log, my good guy, ssh login failed thousands of times. As a security conscious person, I must find a way to stop all this.
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