{"id":13497,"date":"2024-07-12T15:38:58","date_gmt":"2024-07-12T07:38:58","guid":{"rendered":"https:\/\/www.simcentric.com\/uncategorized-sc\/how-firewalls-protect-network-servers-from-attacks\/"},"modified":"2024-07-12T15:41:41","modified_gmt":"2024-07-12T07:41:41","slug":"how-firewalls-protect-network-servers-from-attacks","status":"publish","type":"post","link":"https:\/\/www.simcentric.com\/sc\/hong-kong-dedicated-server-sc\/how-firewalls-protect-network-servers-from-attacks\/","title":{"rendered":"\u9632\u706b\u5899\u5982\u4f55\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\u514d\u53d7\u653b\u51fb\uff1f"},"content":{"rendered":"

\u9632\u706b\u5899<\/a>\u5728\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668<\/a>\u514d\u53d7\u591a\u79cd\u7f51\u7edc\u653b\u51fb\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u9632\u706b\u5899\u5982\u4f55\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\uff0c\u7279\u522b\u662f\u5173\u6ce8\u6280\u672f\u7231\u597d\u8005\u548cIT\u4e13\u4e1a\u4eba\u5458\u9700\u8981\u4e86\u89e3\u7684\u6280\u672f\u7ec6\u8282\u3002<\/p>\n

\u4e86\u89e3\u9632\u706b\u5899\u7684\u57fa\u672c\u539f\u7406<\/strong><\/h2>\n

\u4ece\u672c\u8d28\u4e0a\u8bb2\uff0c\u9632\u706b\u5899\u662f\u4e00\u79cd\u7f51\u7edc\u5b89\u5168\u8bbe\u5907\uff0c\u6839\u636e\u7ec4\u7ec7\u9884\u5148\u5efa\u7acb\u7684\u5b89\u5168\u7b56\u7565\u76d1\u63a7\u548c\u8fc7\u6ee4\u8fdb\u51fa\u7f51\u7edc\u7684\u6d41\u91cf\u3002\u5b83\u5728\u53ef\u4fe1\u7684\u5185\u90e8\u7f51\u7edc\u548c\u4e0d\u53ef\u4fe1\u7684\u5916\u90e8\u7f51\u7edc\uff08\u5982\u4e92\u8054\u7f51\uff09\u4e4b\u95f4\u5145\u5f53\u5c4f\u969c\u3002<\/p>\n

\u9632\u706b\u5899\u7684\u4e3b\u8981\u529f\u80fd<\/strong><\/h2>\n

\u9632\u706b\u5899\u6267\u884c\u591a\u9879\u5173\u952e\u529f\u80fd\u4ee5\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\uff1a<\/p>\n

1. \u6d41\u91cf\u8fc7\u6ee4<\/h2>\n

\u9632\u706b\u5899\u4ed4\u7ec6\u68c0\u67e5\u8fdb\u5165\u6216\u79bb\u5f00\u7f51\u7edc\u7684\u6bcf\u4e2a\u6570\u636e\u5305\u3002\u6b64\u8fc7\u7a0b\u5305\u62ec\u6839\u636e\u9884\u5b9a\u4e49\u7684\u5b89\u5168\u89c4\u5219\u68c0\u67e5\u6570\u636e\u5305\u7684\u6e90\u548c\u76ee\u7684IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u548c\u534f\u8bae\u3002<\/p>\n

2. \u8bbf\u95ee\u63a7\u5236<\/h2>\n

\u9632\u706b\u5899\u901a\u8fc7\u5141\u8bb8\u6216\u62d2\u7edd\u57fa\u4e8eIP\u5730\u5740\u3001\u57df\u540d\u6216\u7528\u6237\u8eab\u4efd\u9a8c\u8bc1\u7684\u6d41\u91cf\u6765\u5b9e\u65bd\u8bbf\u95ee\u63a7\u5236\u7b56\u7565\u3002\u8fd9\u786e\u4fdd\u53ea\u6709\u6388\u6743\u7684\u7528\u6237\u548c\u8bbe\u5907\u53ef\u4ee5\u8bbf\u95ee\u7f51\u7edc\u670d\u52a1\u5668\u3002<\/p>\n

3. \u5165\u4fb5\u68c0\u6d4b\u548c\u9632\u5fa1<\/h2>\n

\u9ad8\u7ea7\u9632\u706b\u5899\u96c6\u6210\u4e86\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\uff08IDS\uff09\u548c\u5165\u4fb5\u9632\u5fa1\u7cfb\u7edf\uff08IPS\uff09\uff0c\u4ee5\u68c0\u6d4b\u548c\u963b\u6b62\u6076\u610f\u6d3b\u52a8\u3002\u8fd9\u4e9b\u7cfb\u7edf\u5206\u6790\u7f51\u7edc\u6d41\u91cf\u6a21\u5f0f\u548c\u884c\u4e3a\uff0c\u4ee5\u8bc6\u522b\u548c\u7f13\u89e3\u6f5c\u5728\u5a01\u80c1\u3002<\/p>\n

\u9632\u706b\u5899\u5982\u4f55\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668<\/strong><\/h2>\n

\u9632\u706b\u5899\u63d0\u4f9b\u591a\u5c42\u9632\u5fa1\u673a\u5236\uff0c\u4ee5\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\u514d\u53d7\u5404\u79cd\u7c7b\u578b\u7684\u7f51\u7edc\u653b\u51fb\u3002\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

1. \u9650\u5236\u4e0d\u5fc5\u8981\u7684\u7aef\u53e3\u8bbf\u95ee<\/h2>\n

\u9632\u706b\u5899\u9650\u5236\u5bf9\u5e38\u89c4\u64cd\u4f5c\u4e0d\u9700\u8981\u7684\u7279\u5b9a\u7aef\u53e3\u7684\u8bbf\u95ee\u3002\u4f8b\u5982\uff0cWeb\u670d\u52a1\u5668\u901a\u5e38\u53ea\u9700\u8981\u6253\u5f00\u7aef\u53e380\uff08HTTP\uff09\u548c443\uff08HTTPS\uff09\u3002\u53ef\u4ee5\u963b\u6b62\u6240\u6709\u5176\u4ed6\u7aef\u53e3\u4ee5\u51cf\u5c11\u653b\u51fb\u9762\u3002<\/p>\n

iptables -A INPUT -p tcp --dport 80 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 443 -j ACCEPT\r\niptables -A INPUT -p tcp -j DROP<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u9632\u706b\u5899\u914d\u7f6e\u5141\u8bb8HTTP\u548cHTTPS\u7aef\u53e3\u4e0a\u7684\u6d41\u91cf\uff0c\u540c\u65f6\u963b\u6b62\u6240\u6709\u5176\u4ed6TCP\u6d41\u91cf\u3002<\/p>\n
2. \u5730\u7406\u4f4d\u7f6e\u8fc7\u6ee4<\/h2>\n
\u9632\u706b\u5899\u53ef\u4ee5\u5e94\u7528\u5730\u7406\u4f4d\u7f6e\u8fc7\u6ee4\uff0c\u963b\u6b62\u6765\u81ea\u5df2\u77e5\u6076\u610f\u6d3b\u52a8\u7684\u7279\u5b9a\u56fd\u5bb6\u6216\u5730\u533a\u7684\u6d41\u91cf\u3002\u8fd9\u4e3a\u7f51\u7edc\u670d\u52a1\u5668\u589e\u52a0\u4e86\u4e00\u5c42\u989d\u5916\u7684\u5b89\u5168\u6027\u3002<\/p>\n
iptables -A INPUT -m geoip --src-cc US, KR -j DROP<\/code><\/pre>\n
\u8fd9\u91cc\u7684\u9632\u706b\u5899\u89c4\u5219\u963b\u6321\u6765\u81ea\u7f8e\u56fd (US) \u548c\u97e9\u56fd (KR) \u7684\u6d41\u91cf\u3002<\/p>\n
3. \u865a\u62df\u4e13\u7528\u7f51\u7edc\uff08VPN\uff09\u96c6\u6210<\/h2>\n
\u9632\u706b\u5899\u901a\u5e38\u4e0eVPN\u96c6\u6210\uff0c\u4ee5\u786e\u4fdd\u8fdc\u7a0b\u8bbf\u95ee\u7f51\u7edc\u670d\u52a1\u5668\u7684\u5b89\u5168\u3002VPN\u63d0\u4f9b\u52a0\u5bc6\u96a7\u9053\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u786e\u4fdd\u654f\u611f\u4fe1\u606f\u4e0d\u4f1a\u88ab\u62e6\u622a\u3002<\/p>\n
4. DDoS\u653b\u51fb\u7f13\u89e3<\/h2>\n
\u9632\u706b\u5899\u53ef\u4ee5\u901a\u8fc7\u76d1\u63a7\u6d41\u91cf\u6a21\u5f0f\u548c\u9650\u5236\u8fde\u63a5\u901f\u7387\u6765\u68c0\u6d4b\u548c\u7f13\u89e3\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\uff08DDoS\uff09\u653b\u51fb\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u7f51\u7edc\u670d\u52a1\u5668\u88ab\u6076\u610f\u6d41\u91cf\u6df9\u6ca1\u3002<\/p>\n
iptables -A INPUT -p tcp --dport 80 -m limit --limit 25\/minute --limit-burst 50 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 80 -j DROP<\/code><\/pre>\n
\u4e0a\u8ff0\u89c4\u5219\u9650\u5236\u8bf7\u6c42\u6570\u4e3a\u6bcf\u5206\u949f25\u4e2a\uff0c\u7a81\u53d1\u8bf7\u6c42\u6570\u4e3a50\u4e2a\uff0c\u4ee5\u9632\u5fa1DDoS\u653b\u51fb\u3002<\/p>\n
\u90e8\u7f72\u548c\u7ba1\u7406\u9632\u706b\u5899<\/strong><\/h2>\n
\u6709\u6548\u7684\u9632\u706b\u5899\u90e8\u7f72\u548c\u7ba1\u7406\u5bf9\u4e8e\u6700\u4f73\u4fdd\u62a4\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
1. \u6b63\u786e\u914d\u7f6e<\/h2>\n
\u786e\u4fdd\u9632\u706b\u5899\u89c4\u5219\u6b63\u786e\u914d\u7f6e\uff0c\u4ee5\u5141\u8bb8\u5408\u6cd5\u6d41\u91cf\uff0c\u540c\u65f6\u963b\u6b62\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\u3002\u5b9a\u671f\u5ba1\u67e5\u548c\u66f4\u65b0\u8fd9\u4e9b\u89c4\u5219\u4ee5\u9002\u5e94\u4e0d\u65ad\u53d8\u5316\u7684\u5a01\u80c1\u3002<\/p>\n
2. \u5b9a\u671f\u66f4\u65b0<\/h2>\n
\u4fdd\u6301\u9632\u706b\u5899\u56fa\u4ef6\u548c\u8f6f\u4ef6\u7684\u6700\u65b0\u72b6\u6001\uff0c\u4ee5\u83b7\u5f97\u6700\u65b0\u7684\u8865\u4e01\u548c\u66f4\u65b0\uff0c\u9632\u6b62\u65b0\u53d1\u73b0\u7684\u6f0f\u6d1e\u3002<\/p>\n
3. \u76d1\u63a7\u548c\u65e5\u5fd7\u8bb0\u5f55<\/h2>\n
\u542f\u7528\u9632\u706b\u5899\u4e0a\u7684\u65e5\u5fd7\u8bb0\u5f55\u548c\u76d1\u63a7\u529f\u80fd\uff0c\u4ee5\u8ddf\u8e2a\u7f51\u7edc\u6d41\u91cf\u5e76\u8bc6\u522b\u6f5c\u5728\u7684\u5b89\u5168\u4e8b\u4ef6\u3002\u5b9a\u671f\u5206\u6790\u65e5\u5fd7\uff0c\u4ee5\u68c0\u6d4b\u5f02\u5e38\u5e76\u53ca\u65f6\u54cd\u5e94\u5a01\u80c1\u3002<\/p>\n
\u5c06\u9632\u706b\u5899\u4e0e\u5176\u4ed6\u5b89\u5168\u63aa\u65bd\u76f8\u7ed3\u5408<\/strong><\/h2>\n
\u5168\u9762\u7684\u5b89\u5168\u7b56\u7565\u5305\u62ec\u5c06\u9632\u706b\u5899\u4e0e\u5176\u4ed6\u5b89\u5168\u63aa\u65bd\u7ed3\u5408\u8d77\u6765\uff0c\u4ee5\u521b\u5efa\u591a\u5c42\u9632\u5fa1\u3002\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
1. \u9632\u706b\u5899\u4e0e\u9632\u75c5\u6bd2\u8f6f\u4ef6<\/h2>\n
\u5c06\u9632\u706b\u5899\u4e0e\u9632\u75c5\u6bd2\u8f6f\u4ef6\u96c6\u6210\uff0c\u4ee5\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\u514d\u53d7\u6076\u610f\u8f6f\u4ef6\u548c\u75c5\u6bd2\u7684\u4fb5\u5bb3\u3002\u9632\u706b\u5899\u963b\u6b62\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u800c\u9632\u75c5\u6bd2\u8f6f\u4ef6\u8bc6\u522b\u548c\u5220\u9664\u6076\u610f\u8f6f\u4ef6\u3002<\/p>\n
2. \u9632\u706b\u5899\u4e0eSIEM<\/h2>\n
\u5b89\u5168\u4fe1\u606f\u548c\u4e8b\u4ef6\u7ba1\u7406\uff08SIEM\uff09\u7cfb\u7edf\u6c47\u96c6\u548c\u5206\u6790\u6765\u81ea\u591a\u4e2a\u6765\u6e90\uff08\u5305\u62ec\u9632\u706b\u5899\uff09\u7684\u5b89\u5168\u6570\u636e\u3002\u8fd9\u63d0\u4f9b\u4e86\u7f51\u7edc\u5b89\u5168\u6001\u52bf\u7684\u6574\u4f53\u89c6\u56fe\uff0c\u6709\u52a9\u4e8e\u66f4\u6709\u6548\u5730\u8bc6\u522b\u548c\u7f13\u89e3\u5a01\u80c1\u3002<\/p>\n
\u9632\u706b\u5899\u5728\u4fdd\u62a4\u7f51\u7edc\u670d\u52a1\u5668\u514d\u53d7\u5404\u79cd\u7f51\u7edc\u653b\u51fb\u65b9\u9762\u4e0d\u53ef\u6216\u7f3a\u3002\u901a\u8fc7\u4e86\u89e3\u5176\u529f\u80fd\u3001\u6709\u6548\u90e8\u7f72\u5b83\u4eec\u5e76\u5c06\u5176\u4e0e\u5176\u4ed6\u5b89\u5168\u63aa\u65bd\u7ed3\u5408\u8d77\u6765\uff0c\u7ec4\u7ec7\u53ef\u4ee5\u663e\u8457\u589e\u5f3a\u5176\u7f51\u7edc\u5b89\u5168\u6027\u3002\u968f\u7740\u7f51\u7edc\u5a01\u80c1\u7684\u4e0d\u65ad\u53d1\u5c55\uff0c\u4fdd\u6301\u4fe1\u606f\u548c\u8b66\u60d5\u662f\u7ef4\u6301\u5f3a\u5927\u4fdd\u62a4\u7684\u5173\u952e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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