本周我们的服务器遭受了一些恶意漏洞扫描，增加了服务器的负载，使其几乎无法使用。
这种攻击很容易防御，只要在发现之后封锁攻击 IP 即可。
有什么方法可以防止这种情况发生？由于其中一次扫描，一台服务器几乎无法使用，这是正常的吗？
这些是在一秒钟内对我们的服务器完成的请求：
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提前致谢！
答案1
您可以设置类似失败2贝恩立即阻止通过系统防火墙进行扫描的主机。
答案2
我认为您没有看到漏洞扫描。您粘贴的日志条目不是我遇到过的任何类型的漏洞探测的典型特征。可能值得花一些额外的时间来弄清楚到底发生了什么（查看用户代理和引荐来源字符串）。
最简单的方法可能是一个快速脚本，用于监视日志文件并记录过去 n 秒内看到相同 IP 地址的次数。一旦它通过任意选择的阈值，就会触发添加 iptables 规则。