\u9999\u6e2f\u4f5c\u4e3a\u5168\u7403\u4e92\u8054\u7f51\u67a2\u7ebd\u7684\u5730\u4f4d\u4e3a\u670d\u52a1\u5668\u5b89\u5168\u5e26\u6765\u4e86\u72ec\u7279\u7684\u6311\u6218\u548c\u673a\u9047\u3002\u9ad8\u901f\u8fde\u63a5\u548c\u6218\u7565\u4f4d\u7f6e\u4f7f\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u5177\u6709\u5438\u5f15\u529b\uff0c\u4f46\u4e5f\u6210\u4e3a\u5404\u79cd\u7f51\u7edc\u5a01\u80c1\u7684\u76ee\u6807\u3002<\/p>\n

\u9999\u6e2f\u79df\u7528\u670d\u52a1\u5668\u9762\u4e34\u7684\u5e38\u89c1\u5a01\u80c1\uff1a<\/h3>\n

\n
• \u5229\u7528\u9ad8\u5e26\u5bbd\u57fa\u7840\u8bbe\u65bd\u7684DDoS\u653b\u51fb<\/li>\n
• \u9488\u5bf9\u6218\u7565\u4e1a\u52a1\u6570\u636e\u7684\u9ad8\u7ea7\u6301\u7eed\u6027\u5a01\u80c1\uff08APT\uff09<\/li>\n
• \u5229\u7528\u53f8\u6cd5\u7ba1\u8f96\u590d\u6742\u6027\u7684\u8de8\u5883\u7f51\u7edc\u72af\u7f6a<\/li>\n<\/ul>\n

  [\/vc_column_text][\/vc_column][\/vc_row] [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] <\/p>\n

  \u8d85\u8d8a\u7aef\u53e3\u6df7\u6dc6\u7684\u6709\u6548\u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565<\/strong><\/h2>\n

  \u867d\u7136\u975e\u6807\u51c6\u7aef\u53e3\u53ef\u4ee5\u5728\u66f4\u5e7f\u6cdb\u7684\u5b89\u5168\u7b56\u7565\u4e2d\u53d1\u6325\u4f5c\u7528\uff0c\u4f46\u4e0d\u5e94\u5c06\u5176\u4f5c\u4e3a\u4e3b\u8981\u9632\u5fa1\u673a\u5236\u3002\u4ee5\u4e0b\u662f\u66f4\u5f3a\u5927\u7684\u65b9\u6cd5\u6765\u4fdd\u62a4\u60a8\u5728\u9999\u6e2f\u79df\u7528\u7684\u670d\u52a1\u5668\uff1a<\/p>\n

  1. \u9ad8\u7ea7\u9632\u706b\u5899\u914d\u7f6e<\/h3>\n

  \u5b9e\u65bd\u4e00\u4e2a\u8d85\u8d8a\u7b80\u5355\u7aef\u53e3\u963b\u6321\u7684\u590d\u6742\u9632\u706b\u5899\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528iptables\u7684\u793a\u4f8b\u914d\u7f6e\uff1a<\/p>\n

  \r\n# Allow established connections\r\niptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT\r\n\r\n# Allow SSH (adjust port if non-standard)\r\niptables -A INPUT -p tcp --dport 22 -j ACCEPT\r\n\r\n# Allow HTTP and HTTPS\r\niptables -A INPUT -p tcp --dport 80 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 443 -j ACCEPT\r\n\r\n# Block all other incoming traffic\r\niptables -A INPUT -j DROP\r\n\r\n# Save rules\r\niptables-save > \/etc\/iptables\/rules.v4\r\n    <\/code><\/pre>\n
  2. \u5b9e\u65bd\u5f3a\u5927\u7684\u8eab\u4efd\u9a8c\u8bc1<\/h3>\n
  \u4f7f\u7528\u591a\u56e0\u7d20\u8eab\u4efd\u9a8c\u8bc1\uff08MFA\uff09\u548c\u5f3a\u5bc6\u7801\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5f3a\u5236\u5bc6\u7801\u590d\u6742\u6027\u7684\u7b80\u5355\u811a\u672c\uff1a<\/p>\n
  \r\n#!\/bin\/bash\r\n\r\n# Minimum password length\r\nMIN_LENGTH=12\r\n\r\n# Check password length\r\nif [ ${#1} -lt $MIN_LENGTH ]; then\r\n    echo \"\u5bc6\u7801\u957f\u5ea6\u5fc5\u987b\u81f3\u5c11\u4e3a $MIN_LENGTH \u4e2a\u5b57\u7b26\"\r\n    exit 1\r\nfi\r\n\r\n# Check for uppercase, lowercase, numbers, and special characters\r\nif ! [[ \"$1\" =~ [A-Z] ]] || ! [[ \"$1\" =~ [a-z] ]] || ! [[ \"$1\" =~ [0-9] ]] || ! [[ \"$1\" =~ [!@#$%^&*()_+] ]]; then\r\n    echo \"\u5bc6\u7801\u5fc5\u987b\u5305\u542b\u5927\u5199\u5b57\u6bcd\u3001\u5c0f\u5199\u5b57\u6bcd\u3001\u6570\u5b57\u548c\u7279\u6b8a\u5b57\u7b26\"\r\n    exit 1\r\nfi\r\n\r\necho \"\u5bc6\u7801\u7b26\u5408\u590d\u6742\u6027\u8981\u6c42\"\r\nexit 0\r\n    <\/code><\/pre>\n
  3. \u5b9a\u671f\u66f4\u65b0\u548c\u8865\u4e01\u7ba1\u7406<\/h3>\n
  \u4fdd\u6301\u7cfb\u7edf\u66f4\u65b0\u4ee5\u9632\u6b62\u5df2\u77e5\u6f0f\u6d1e\u3002\u4f7f\u7528\u50cfunattended-upgrades\u8fd9\u6837\u7684\u5de5\u5177\u81ea\u52a8\u5316\u6b64\u8fc7\u7a0b\uff0c\u9002\u7528\u4e8e\u57fa\u4e8eDebian\u7684\u7cfb\u7edf\uff1a<\/p>\n
  \r\nsudo apt-get install unattended-upgrades\r\nsudo dpkg-reconfigure --priority=low unattended-upgrades\r\n    <\/code><\/pre>\n
  4. \u5b9e\u65bd\u5165\u4fb5\u68c0\u6d4b\u548c\u9884\u9632\u7cfb\u7edf\uff08IDS\/IPS\uff09<\/h3>\n
  \u50cfSuricata\u8fd9\u6837\u7684\u5de5\u5177\u53ef\u4ee5\u76d1\u63a7\u7f51\u7edc\u6d41\u91cf\u4e2d\u7684\u53ef\u7591\u6d3b\u52a8\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684Suricata\u914d\u7f6e\uff1a<\/p>\n
  \r\n# \/etc\/suricata\/suricata.yaml\r\nvars:\r\n  address-groups:\r\n    HOME_NET: \"[192.168.0.0\/16,10.0.0.0\/8,172.16.0.0\/12]\"\r\n    EXTERNAL_NET: \"!$HOME_NET\"\r\n\r\n# Enable IPS mode\r\naf-packet:\r\n  - interface: eth0\r\n    cluster-id: 99\r\n    cluster-type: cluster_flow\r\n    defrag: yes\r\n\r\n# Set rules\r\nrule-files:\r\n  - suricata.rules\r\n\r\n# Enable alerts\r\noutputs:\r\n  - fast:\r\n      enabled: yes\r\n      filename: fast.log\r\n      append: yes\r\n    <\/code><\/pre>\n
    [\/vc_column_text][\/vc_column][\/vc_row] [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]  <\/p>\n
  \u5229\u7528\u9999\u6e2f\u7684\u72ec\u7279\u5730\u4f4d\u589e\u5f3a\u5b89\u5168\u6027<\/strong><\/h2>\n
  \u9999\u6e2f\u7684\u6218\u7565\u4f4d\u7f6e\u5141\u8bb8\u5b9e\u65bd\u521b\u65b0\u7684\u5b89\u5168\u67b6\u6784\u3002\u8003\u8651\u5b9e\u65bd\u591a\u5c42\u6b21\u65b9\u6cd5\uff1a<\/p>\n
  \n
  \u4f7f\u7528\u5728\u9999\u6e2f\u8bbe\u6709\u8282\u70b9\u7684\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u8fdb\u884cDDoS\u7f13\u89e3<\/li>\n
  \u5b9e\u65bd\u5730\u7406\u5c01\u9501\u4ee5\u9650\u5236\u6765\u81ea\u9ad8\u98ce\u9669\u5730\u533a\u7684\u8bbf\u95ee<\/li>\n
  \u5229\u7528\u9999\u6e2f\u7684\u9ad8\u901f\u8fde\u63a5\u8fdb\u884c\u5b9e\u65f6\u5b89\u5168\u76d1\u63a7\u548c\u5feb\u901f\u54cd\u5e94<\/li>\n<\/ul>\n
    [\/vc_column_text][\/vc_column][\/vc_row] [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]  <\/p>\n
  \u7ed3\u8bba\uff1a\u8d85\u8d8a\u7aef\u53e3\u6df7\u6dc6<\/strong><\/h2>\n
  \u867d\u7136\u4f7f\u7528\u975e\u6807\u51c6\u7aef\u53e3\u53ef\u4ee5\u4f5c\u4e3a\u6df1\u5ea6\u9632\u5fa1\u7b56\u7565\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u663e\u7136\uff0c\u5f3a\u5927\u7684\u670d\u52a1\u5668\u5b89\u5168\u6027\uff0c\u7279\u522b\u662f\u5728\u50cf\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u8fd9\u6837\u7684\u52a8\u6001\u73af\u5883\u4e2d\uff0c\u9700\u8981\u591a\u65b9\u9762\u7684\u65b9\u6cd5\u3002\u4e13\u6ce8\u4e8e\u5b9e\u65bd\u5f3a\u5927\u7684\u8eab\u4efd\u9a8c\u8bc1\u3001\u4fdd\u6301\u7cfb\u7edf\u66f4\u65b0\u3001\u4f7f\u7528\u9ad8\u7ea7\u9632\u706b\u5899\u914d\u7f6e\uff0c\u5e76\u5229\u7528\u9999\u6e2f\u5728\u5168\u7403\u7f51\u7edc\u683c\u5c40\u4e2d\u7684\u72ec\u7279\u5730\u4f4d\u3002<\/p>\n
  \u8bf7\u8bb0\u4f4f\uff0c\u771f\u6b63\u7684\u5b89\u5168\u6027\u6765\u81ea\u4e8e\u4e00\u4e2a\u5168\u9762\u7684\u7b56\u7565\uff0c\u8be5\u7b56\u7565\u9488\u5bf9\u591a\u5c42\u6f5c\u5728\u6f0f\u6d1e\u3002\u901a\u8fc7\u7ed3\u5408\u5404\u79cd\u6280\u672f\u5e76\u4fdd\u6301\u8b66\u60d5\uff0c\u60a8\u53ef\u4ee5\u663e\u8457\u589e\u5f3a\u670d\u52a1\u5668\u62b5\u5fa1\u7f51\u7edc\u5a01\u80c1\u7684\u80fd\u529b\uff0c\u65e0\u8bba\u60a8\u9009\u62e9\u4f7f\u7528\u54ea\u4e9b\u7aef\u53e3\u3002<\/p>\n
    [\/vc_column_text][\/vc_column][\/vc_row] [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]  <\/p>\n
  \u5e38\u89c1\u95ee\u9898\u89e3\u7b54\uff1a\u5173\u4e8e\u670d\u52a1\u5668\u5b89\u5168\u548c\u975e\u6807\u51c6\u7aef\u53e3\u7684\u5e38\u89c1\u95ee\u9898<\/strong><\/h2>\n
  \n
  \u95ee\uff1a\u5c06SSH\u4ece22\u7aef\u53e3\u66f4\u6539\u4e3a\u975e\u6807\u51c6\u7aef\u53e3\u771f\u7684\u80fd\u63d0\u9ad8\u5b89\u5168\u6027\u5417\uff1f<\/strong>
  \n        \u7b54\uff1a\u867d\u7136\u5b83\u53ef\u4ee5\u51cf\u5c11\u81ea\u52a8\u626b\u63cf\uff0c\u4f46\u5b83\u4e0d\u80fd\u66ff\u4ee3\u5f3a\u5927\u7684\u8eab\u4efd\u9a8c\u8bc1\u548c\u9002\u5f53\u7684\u9632\u706b\u5899\u914d\u7f6e\u3002<\/li>\n
  \u95ee\uff1a\u4f7f\u7528\u975e\u6807\u51c6\u7aef\u53e3\u662f\u5426\u6709\u4efb\u4f55\u6027\u80fd\u5f71\u54cd\uff1f<\/strong>
  \n        \u7b54\uff1a\u901a\u5e38\u6ca1\u6709\u3002\u7aef\u53e3\u53f7\u4e0d\u4f1a\u663e\u8457\u5f71\u54cd\u6027\u80fd\u3002\u7136\u800c\uff0c\u5b83\u53ef\u80fd\u4f1a\u4f7f\u7f51\u7edc\u914d\u7f6e\u53d8\u5f97\u590d\u6742\u3002<\/li>\n
  \u95ee\uff1a\u6211\u5982\u4f55\u53d1\u73b0\u54ea\u4e9b\u7aef\u53e3\u5728\u6211\u7684\u9999\u6e2f\u79df\u7528\u670d\u52a1\u5668\u4e0a\u88ab\u626b\u63cf\uff1f<\/strong>
  \n        \u7b54\uff1a\u4f7f\u7528\u50cf`netstat`\u6216`ss`\u8fd9\u6837\u7684\u5de5\u5177\u6765\u76d1\u63a7\u4f20\u5165\u8fde\u63a5\uff0c\u6216\u5b9e\u65bd\u7aef\u53e3\u626b\u63cf\u68c0\u6d4b\u7cfb\u7edf\u3002<\/li>\n<\/ol>\n
  \u5728\u9999\u6e2f\u52a8\u6001\u7684\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u4fdd\u62a4\u60a8\u7684\u670d\u52a1\u5668\u9700\u8981\u6301\u7eed\u7684\u8b66\u60d5\u548c\u9002\u5e94\u3002\u901a\u8fc7\u5b9e\u65bd\u8d85\u8d8a\u7b80\u5355\u7aef\u53e3\u64cd\u4f5c\u7684\u5168\u9762\u5b89\u5168\u7b56\u7565\uff0c\u60a8\u53ef\u4ee5\u66f4\u597d\u5730\u4fdd\u62a4\u60a8\u7684\u8d44\u4ea7\u514d\u53d7\u4e0d\u65ad\u6f14\u53d8\u7684\u7f51\u7edc\u5a01\u80c1\u3002<\/p>\n
  [\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
  [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u5728\u4e0d\u65ad\u6f14\u53d8\u7684\u7f51\u7edc\u5b89\u5168\u9886\u57df\uff0c\u670d\u52a1\u5668\u7ba1\u7406\u5458\u4e0d\u65ad\u5bfb\u6c42\u521b\u65b0\u65b9\u6cd5\u6765\u52a0\u5f3a\u9632\u5fa1\u3002\u4e00\u79cd\u5b58\u5728\u4e89\u8bae\u7684\u7b56\u7565\u662f\u4f7f\u7528\u975e\u6807\u51c6\u7aef\u53e3\u800c\u4e0d\u662f\u5e38\u7528\u7aef\u53e3\uff08\u5982443\uff09\u3002\u672c\u6587\u6df1\u5165\u63a2\u8ba8\u4e86\u8fd9\u79cd\u505a\u6cd5\uff0c\u7279\u522b\u662f\u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\uff0c\u5ba1\u89c6\u5176\u5728\u589e\u5f3a\u670d\u52a1\u5668\u5b89\u5168\u6027\u65b9\u9762\u7684\u6709\u6548\u6027\u3002 [\/vc_column_text][\/vc_column][\/vc_row] [vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u63ed\u79d8\u7aef\u53e3\u53ca\u5176\u5728\u670d\u52a1\u5668\u5b89\u5168\u4e2d\u7684\u4f5c\u7528 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\u5b9e\u65bd\u4e00\u4e2a\u8d85\u8d8a\u7b80\u5355\u7aef\u53e3\u963b\u6321\u7684\u590d\u6742\u9632\u706b\u5899\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528iptables\u7684\u793a\u4f8b\u914d\u7f6e\uff1a # Allow established connections iptables -A INPUT -m conntrack –ctstate ESTABLISHED,RELATED -j ACCEPT # Allow SSH […]<\/p>\n
  Read More…<\/a><\/p>\n","protected":false},"author":3,"featured_media":16419,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[3743,3744,2241,849,248],"class_list":["post-16434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-non-standard-ports-sc","tag-firewall-configuration-sc","tag-ddos-protection-sc","tag-server-security-sc","tag-hong-kong-server-rental-sc"],"acf":[],"yoast_head":"\n