{"id":17245,"date":"2024-11-18T10:44:44","date_gmt":"2024-11-18T02:44:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17245\/"},"modified":"2024-11-18T10:44:44","modified_gmt":"2024-11-18T02:44:44","slug":"%e5%a6%82%e4%bd%95%e8%bf%9b%e8%a1%8clinux%e7%b3%bb%e7%bb%9f%e7%9a%84%e5%ae%89%e5%85%a8%e5%8a%a0%e5%9b%ba%e4%b8%8e%e6%bc%8f%e6%b4%9e%e4%bf%ae%e5%a4%8d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17245\/","title":{"rendered":"\u5982\u4f55\u8fdb\u884cLinux\u7cfb\u7edf\u7684\u5b89\u5168\u52a0\u56fa\u4e0e\u6f0f\u6d1e\u4fee\u590d"},"content":{"rendered":"

\"\u5982\u4f55\u8fdb\u884cLinux\u7cfb\u7edf\u7684\u5b89\u5168\u52a0\u56fa\u4e0e\u6f0f\u6d1e\u4fee\u590d\u63d2\u56fe\"<\/p>\n

\u968f\u7740\u6bcf\u4e2a\u4f01\u4e1a\u8d8a\u6765\u8d8a\u4f9d\u8d56\u4e8e\u4e92\u8054\u7f51\uff0c\u7f51\u7edc\u5b89\u5168\u65e5\u76ca\u6210\u4e3a\u7ec4\u7ec7\u7126\u70b9\u3002\u5728\u8fd9\u65b9\u9762\uff0cLinux\u7cfb\u7edf\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u8d77\u70b9\u3002\u7531\u4e8e\u5f00\u6e90\u3001\u5e7f\u6cdb\u4f7f\u7528\u3001\u65e0\u9700\u6388\u6743\u7b49\u7279\u70b9\uff0cLinux\u7cfb\u7edf\u6210\u4e3a\u4e86\u5f88\u591a\u7ec4\u7ec7\u548c\u4f01\u4e1a\u7684\u9996\u9009\u64cd\u4f5c\u7cfb\u7edf\u3002\u7136\u800c\uff0cLinux\u7cfb\u7edf\u7684\u98ce\u9669\u4e5f\u5728\u4e0d\u65ad\u589e\u52a0\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u52a0\u56fa\u548c\u4fee\u590dLinux\u7cfb\u7edf\u6f0f\u6d1e\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e9b\u793a\u4f8b\u4ee3\u7801\uff0c\u5e2e\u52a9\u60a8\u5bf9Linux\u7cfb\u7edf\u8fdb\u884c\u66f4\u52a0\u5b89\u5168\u65b9\u9762\u7684\u914d\u7f6e\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u91cd\u70b9\u5173\u6ce8\u8fd9\u4e9b\u65b9\u9762\uff1a\u7528\u6237\u7ba1\u7406\u3001\u6587\u4ef6\u548c\u76ee\u5f55\u6743\u9650\u3001\u7f51\u7edc\u548c\u670d\u52a1\u5668\u914d\u7f6e\u4ee5\u53ca\u5e94\u7528\u5b89\u5168\u3002\u4e0b\u9762\u5c06\u4ecb\u7ecd\u6bcf\u4e2a\u65b9\u9762\u7684\u8be6\u7ec6\u63aa\u65bd\u548c\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\n

    \n
  1. \u7528\u6237\u7ba1\u7406<\/li>\n<\/ol>\n

    \u5f3a\u5bc6\u7801<\/p>\n

    \u5236\u5b9a\u4e00\u4e2a\u5bc6\u7801\u7b56\u7565\uff0c\u8981\u6c42\u7528\u6237\u9009\u62e9\u590d\u6742\u7684\u5bc6\u7801\uff0c\u5e76\u4e14\u5b9a\u671f\u66f4\u6362\u5bc6\u7801\u3002<\/p>\n

    #\u5f3a\u5236\u7528\u6237\u9009\u62e9\u5177\u5907\u6700\u4f4e\u5bc6\u7801\u5f3a\u5ea6\u7684\u5bc6\u7801\nauth requisite pam_passwdqc.so enforce=users\n#\u5f3a\u5236\/\u7528\u6237\u66f4\u6539\u81ea\u5df1\u7684\u5bc6\u7801\nauth required pam_warn.so\nauth required pam_passwdqc.so min=disabled,disabled,12,8,7\nauth required pam_unix.so remember=24 sha512 shadow\n<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u7981\u6b62root\u8fdc\u7a0b\u767b\u5f55<\/p>\n
    \u5efa\u8bae\u8bbe\u7f6e\u53ea\u6709\u5177\u5907root\u6743\u9650\u7684\u7528\u6237\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8fde\u63a5\u3002\u5728\/etc\/ssh\/sshd_config\u4e2d\u914d\u7f6ePermitRootLogin\u4e3ano\u3002<\/p>\n
    \u767b\u5f55\u8d85\u65f6<\/p>\n
    \u8d85\u65f6\u8bbe\u7f6e\u53ef\u4ee5\u786e\u4fdd\u5728\u7a7a\u95f2\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\u81ea\u52a8\u65ad\u5f00\u8fde\u63a5\u3002\u5728\/etc\/profile\u6216~\/.bashrc\u4e2d\u8bbe\u7f6e\u5982\u4e0b\uff1a<\/p>\n
    #\u8bbe\u7f6e\u7a7a\u95f2\u767b\u9646\u8d85\u65f6\u9000\u51fa\u65f6\u95f4\u4e3a300\u79d2\nTMOUT=300\nexport TMOUT\n<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    1. \u6587\u4ef6\u548c\u76ee\u5f55\u6743\u9650<\/li>\n<\/ol>\n
      \u9ed8\u8ba4\u914d\u7f6e<\/p>\n
      \u9ed8\u8ba4\u914d\u7f6e\u5c06\u5141\u8bb8\u6240\u6709\u7528\u6237\u90fd\u53ef\u4ee5\u67e5\u770b\u5230\u6240\u6709\u7684\u6587\u4ef6\u548c\u76ee\u5f55\u3002\u5728\/etc\/fstab\u6587\u4ef6\u4e2d\u52a0\u5165\u5982\u4e0b\u5185\u5bb9\uff1a<\/p>\n
      tmpfs \/tmp            tmpfs defaults,noatime,mode=1777 0  0\ntmpfs \/var\/tmp        tmpfs defaults,noatime,mode=1777 0  0\ntmpfs \/dev\/shm        tmpfs defaults,noatime,mode=1777 0  0\n<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u786e\u5b9a\u654f\u611f\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u6743\u9650<\/p>\n
      \u5e94\u8be5\u5c06\u8bbf\u95ee\u6743\u9650\u9650\u5236\u5728\u7279\u5b9a\u7528\u6237\u7ec4\u6216\u4e2a\u4eba\u8eab\u4e0a\u3002\u4f7f\u7528chown\u548cchmod\u547d\u4ee4\u6765\u4fee\u6539\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u6743\u9650\uff0c\u4e0b\u9762\u793a\u4f8b\u662f\u4e3a\u67d0\u4e2a\u76ee\u5f55\u8bbe\u7f6e\u53ea\u80fdroot\u7528\u6237\u4fee\u6539\uff1a<\/p>\n
      #\u4fee\u6539\u67d0\u76ee\u5f55\u53ea\u80fdroot\u7528\u6237\u4fee\u6539\nchown root \/etc\/cron.deny\nchmod 600 \/etc\/cron.deny\n<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \u68c0\u67e5SUID\u3001SGID\u3001Sticky Bit\u4f4d<\/p>\n
      SUID \uff08Set user ID\uff09, SGID\uff08Set group ID\uff09\uff0cSticky Bit\u7b49\u4f4d\u662fLinux\u7cfb\u7edf\u4e2d\u7684\u4e00\u4e9b\u5b89\u5168\u6807\u8bb0\uff0c\u9700\u8981\u5b9a\u671f\u5ba1\u8ba1\u3002\u4e0b\u9762\u7684\u547d\u4ee4\u7528\u6765\u67e5\u627e\u4efb\u4f55\u4e0d\u5408\u683c\u7684\u6743\u9650\u60c5\u51b5\uff1a<\/p>\n
      #\u67e5\u627eSUID\u6743\u9650\u672a\u88ab\u4f7f\u7528\u7684\u6587\u4ef6\u548c\u76ee\u5f55\nfind \/ -perm +4000 ! -type d -exec ls -la {} ; 2&gt;\/dev\/null\n#\u67e5\u627eSGID\u6743\u9650\u672a\u88ab\u4f7f\u7528\u7684\u6587\u4ef6\u548c\u76ee\u5f55\nfind \/ -perm +2000 ! -type d -exec ls -la {} ; 2&gt;\/dev\/null\n#\u67e5\u627e\u7c98\u6ede\u4f4d\u672a\u8bbe\u7f6e\u7684\u76ee\u5f55\nfind \/ -perm -1000 ! -type d -exec ls -la {} ; 2&gt;\/dev\/null\n<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \n
      1. \u7f51\u7edc\u548c\u670d\u52a1\u5668\u914d\u7f6e<\/li>\n<\/ol>\n
        \u9632\u706b\u5899<\/p>\n
        iptables\u662fLinux\u4e2d\u6700\u5e38\u7528\u7684\u9632\u706b\u5899\u5e94\u7528\u4e4b\u4e00\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u963b\u6b62\u4e86\u6240\u6709\u8fdb\u5165\u7684\u8bbf\u95ee\uff1a<\/p>\n
        #\u6e05\u7a7a\u6240\u6709\u89c4\u5219\u548c\u94fe\niptables -F\niptables -X\n#\u5141\u8bb8\u6240\u6709\u672c\u5730\u8fdb\u51fa\u7684\u901a\u4fe1\uff0c\u5e76\u62d2\u7edd\u6240\u6709\u8fdc\u7a0b\u7684\u8bbf\u95ee\niptables -P INPUT DROP\niptables -P OUTPUT DROP\n#\u6dfb\u52a0\u89c4\u5219\niptables -A INPUT -i lo -j ACCEPT\niptables -A OUTPUT -o lo -j ACCEPT\n<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \u9650\u5236\u670d\u52a1\u8bbf\u95ee<\/p>\n
        \u4e00\u4e9b\u670d\u52a1\u5e94\u8be5\u4ec5\u5728\u672c\u5730\u4e2d\u8fd0\u884c\uff0c\u88ab\u5916\u7f51\u8bbf\u95ee\u5b58\u5728\u5f88\u5927\u7684\u98ce\u9669\u3002\u5728\/etc\/hosts.allow\u3001\/etc\/hosts.deny\u76ee\u5f55\u4e2d\u5236\u5b9a\u89c4\u5219\uff0c\u7528\u6765\u9650\u5236\u8bbf\u95ee\u670d\u52a1\u7684\u65f6\u95f4\uff0cIP\u7b49\u4fe1\u606f\u3002<\/p>\n
          \n
        1. \u5e94\u7528\u7a0b\u5e8f\u5b89\u5168<\/li>\n<\/ol>\n
          \u66f4\u65b0\u8f6f\u4ef6\u5305<\/p>\n
          \u65e0\u8bba\u662f\u5185\u6838\u8fd8\u662f\u7528\u6237\u7a7a\u95f4\u8f6f\u4ef6\uff0c\u90fd\u9700\u8981\u5b9a\u671f\u66f4\u65b0\u6765\u89e3\u51b3\u5df2\u77e5\u7684Bug\u548c\u6f0f\u6d1e\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528yum\u3001rpm\u7b49\u5de5\u5177\u6765\u66f4\u65b0\u8f6f\u4ef6\u5305\u3002\u4e0b\u9762\u7ed9\u51fa\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
          #\u66f4\u65b0\u5df2\u5b89\u88c5\u7684\u6240\u6709\u8f6f\u4ef6\u5305\nyum -y update\n#\u66f4\u65b0\u5355\u4e2a\u8f6f\u4ef6\u5305\nyum -y update <package><\/package><\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u907f\u514d\u4f7f\u7528root\u7528\u6237\u8fd0\u884c\u5e94\u7528<\/p>\n
          \u8fd0\u884c\u5e94\u7528\u65f6\uff0c\u5e94\u8be5\u4f7f\u7528\u975e\u7279\u6743\u7528\u6237\uff0c\u4e0d\u8981\u4f7f\u7528root\u7528\u6237\u8fd0\u884c\u5e94\u7528\u3002<\/p>\n
          \u7f16\u8bd1\u9759\u6001\u94fe\u63a5\u5e93<\/p>\n
          \u9759\u6001\u94fe\u63a5\u5e93\u5305\u542b\u4e86\u7f16\u5199\u5e94\u7528\u7a0b\u5e8f\u7684\u6240\u6709\u4f9d\u8d56\u5173\u7cfb\uff0c\u53ef\u4ee5\u907f\u514d\u5176\u4ed6\u7528\u6237\u7be1\u6539\u4f9d\u8d56\u5305\u3002\u4e0b\u9762\u7ed9\u51fa\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
          #\u7f16\u8bd1\u9759\u6001\u94fe\u63a5\u5e93\ngcc -o app app.c -static\n<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
          \u7ed3\u8bba<\/p>\n
          Linux\u7cfb\u7edf\u7684\u5b89\u5168\u52a0\u56fa\u4e0e\u6f0f\u6d1e\u4fee\u590d\u5de5\u4f5c\u4e0d\u6b62\u4e8e\u6b64\uff0c\u4f46\u4e0a\u8ff0\u63aa\u65bd\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u52a0\u5f3aLinux\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e9b\u63aa\u65bd\u5e76\u4e0d\u80fd\u5b8c\u5168\u4fdd\u8bc1\u7cfb\u7edf\u7684\u5b89\u5168\uff0c\u7ec4\u7ec7\u548c\u4f01\u4e1a\u5e94\u8be5\u91c7\u53d6\u591a\u4e2a\u65b9\u9762\u7684\u63aa\u65bd\u6765\u4fdd\u8bc1\u5b89\u5168\u3002<\/p>\n
          \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u8fdb\u884cLinux\u7cfb\u7edf\u7684\u5b89\u5168\u52a0\u56fa\u4e0e\u6f0f\u6d1e\u4fee\u590d\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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