我最近重新安装了 VPS 操作系统，目前我的 public_folder 中没有任何网站。为了调查 dovecot 错误（当然这不是我的问题），我发出了
tail -n 20 domains/mydomain.com.error.log
结果
[Sat Aug 09 01:53:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:54:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:55:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:56:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:57:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:58:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 01:59:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:00:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:01:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:02:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:03:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:04:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:05:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:06:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:07:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:08:42 2014] [error] [client 141.8.xxx.x] File does not exist: /home/admin/domains/domain.com/public_html/robots.txt
[Sat Aug 09 02:08:42 2014] [error] [client 141.8.xxx.x] File does not exist: /home/admin/domains/domain.com/public_html/robots.txt
[Sat Aug 09 02:08:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:09:53 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
[Sat Aug 09 02:10:54 2014] [error] [client 158.58.xxx.xxx] File does not exist: /home/admin/domains/domain.com/public_html/folder1
我无法理解的是，上面几行中存在不属于我作为客户端的 IP 地址 158.58.xxx.xxx 和 141.8.xxx.x。您能解释一下这些行是什么意思吗？它们与我的 public_folder 有什么关系？
提前致谢。
答案1
这些很可能是“背景噪音”——大型僵尸网络一直在试图寻找服务器中未修补的安全漏洞并利用这些漏洞。
如果您的流量仅来自一组固定地址，您可以配置防火墙来阻止除有效地址之外的所有内容，但在大多数情况下，我们必须忍受这种情况（当然，还要保持我们的服务器修补和安全）。