{"id":2567,"date":"2017-08-05T15:55:56","date_gmt":"2017-08-05T07:55:56","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2567"},"modified":"2024-11-15T15:57:56","modified_gmt":"2024-11-15T07:57:56","slug":"linux%e8%a2%abddos%e5%8f%8acc%e6%94%bb%e5%87%bb%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/linux\/linux%e8%a2%abddos%e5%8f%8acc%e6%94%bb%e5%87%bb%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88\/","title":{"rendered":"Linux\u88abDDOS\u53caCC\u653b\u51fb\u89e3\u51b3\u65b9\u6848"},"content":{"rendered":"

\u80cc\u666f<\/h2>\n

\u73b0\u5728DDOS\u653b\u51fb\u8d8a\u6765\u8d8a\u9891\u7e41,\u65e0\u9700\u4ec0\u4e48\u6280\u672f\u5373\u53ef\u5c31\u884cDDOS\u62d2\u7edd\u670d\u52a1\u7ecf\u5e38\u4e00\u4e9b\u7ad9\u957f\u53cd\u6620\u81ea\u5df1\u7684\u7f51\u7ad9\u7ecf\u5e38\u51fa\u73b0mysql 1040\u9519\u8bef\uff0c\u4ed6\u7684\u5728\u7ebf\u7528\u6237\u624d\u4e0d\u5230\u4e00\u5343\uff0cmysql\u914d\u7f6e\u4e5f\u6ca1\u95ee\u9898\u3002\u4e00\u822c\u9047\u5230\u8fd9\u7ad9\u60c5\u51b5\u5c31\u9700\u6ce8\u610f\u4e86,\u4f60\u7684\u7f51\u7ad9\u53ef\u80fd\u88abCC\u653b\u51fb\u4e86\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6848\u53ca\u601d\u8def<\/p>\n

CC\u653b\u51fb\u9632\u5fa1\u63aa\u65bd\uff0c\u9274\u4e8e\u7cfb\u7edf\u662fcentos\uff0c\u8fd0\u884c\u4e86\u4e0b\u9762\u7684\u8fd9\u4e24\u884c\u547d\u4ee4\u3002<\/p>\n\n\n\n
\n
\n

\n<\/code><\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
netstat<\/code>\u00a0-anlp|<\/code>grep<\/code>\u00a080|<\/code>grep<\/code>\u00a0tcp|<\/code>awk<\/code>\u00a0'{print\u00a0$5}'<\/code>|<\/code>awk<\/code>\u00a0-F:\u00a0<\/code>'{print\u00a0$1}'<\/code>|<\/code>sort<\/code>|<\/code>uniq<\/code>\u00a0-c|<\/code>sort<\/code>\u00a0-nr|<\/code>head<\/code>\u00a0-n20\u00a0|\u00a0<\/code>netstat<\/code>\u00a0-ant\u00a0|<\/code>awk<\/code>\u00a0'\/:80\/{split($5,ip,\":\");++A[ip[1]]}END{for(i\u00a0in\u00a0A)\u00a0print\u00a0A[i],i}'<\/code>\u00a0|<\/code>sort<\/code>\u00a0-rn|<\/code>head<\/code>\u00a0-n20<\/code><\/div>\n<\/div>\n

\u628a\u8bf7\u6c42\u8fc7\u591a\u7684IP\u8bb0\u5f55\u4e0b\u6765\u3002<\/p>\n\n\n\n
\n
\n
222.127.94.*<\/code><\/div>\n
247.27.128.*<\/code><\/div>\n
145.27.133.*<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5f00\u59cb\u5c01\u7981IP\uff0c\u5177\u4f53\u53ef\u4ee5\u770b\u6211\u4e0b\u9762\u8fd0\u884c\u7684\u547d\u4ee4\u3002\u672c\u6587\u4e3b\u8981\u662f\u91c7\u7528iptables\u8fdb\u884c\u5c01\u7981<\/p>\n\n\n\n
\n
\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0222.127.94.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0247.27.128.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0145.27.133.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0193.1.0.0<\/code>\/8<\/code>\u00a0-j\u00a0DROP\u00a0\u3010\u614e\u7528\u5c01\u7981\u6574\u4e2a\u6bb5\u3011<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd0\u884c\u4e0a\u9762\u8fd9\u4e9b\u547d\u4ee4\u4e4b\u540e\u6211\u4eec\u5df2\u7ecf\u5b8c\u6210\u5c01\u7981\u64cd\u4f5c\u4e86\uff0c\u4e0d\u8fc7\u8fd8\u5f97\u4fdd\u5b58\u4e00\u4e0b\uff0c\u5982\u679c\u4e0d\u4fdd\u5b58\u7684\u8bdd\u91cd\u542f\u7cfb\u7edf\u4e4b\u540e\u4e0a\u9762\u8bbe\u5b9a\u7684\u89c4\u5219\u4f1a\u6d88\u5931\u3002<\/p>\n\n\n\n
\n
\n
service\u00a0iptables\u00a0save<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd0\u884c\u4e0b\u9762\u8fd9\u884c\u547d\u4ee4\uff0c\u6765\u67e5\u770b\u8c01\u7684\u8bbf\u95ee\u91cf\u6700\u9ad8\uff08\u9700\u8981\u670d\u52a1\u5668\u5b89\u88c5tcpdump\uff09<\/p>\n

tcpdump\u00a0-i\u00a0eth0\u00a0-tnn\u00a0dst\u00a0port\u00a080\u00a0-c\u00a01000\u00a0|\u00a0<\/code>awk<\/code>\u00a0-F<\/code>\".\"<\/code>\u00a0'{print\u00a0$1\".\"$2\".\"$3\".\"$4}'<\/code>\u00a0|\u00a0<\/code>sort<\/code>\u00a0|\u00a0<\/code>uniq<\/code>\u00a0-c\u00a0|\u00a0<\/code>sort<\/code>\u00a0-nr\u00a0|<\/code>head<\/code>\u00a0-20<\/code><\/div>\n
<\/div>\n\n\n\n
\n
\n

\n<\/code><\/code><\/div>\n
\u00a0<\/code><\/div>\n
tcpdump:\u00a0verbose\u00a0output\u00a0suppressed,\u00a0use\u00a0-<\/code>v<\/code>\u00a0or\u00a0-vv\u00a0<\/code>for<\/code>\u00a0full\u00a0protocol\u00a0decode<\/code><\/div>\n
listening\u00a0on\u00a0eth0,\u00a0link-<\/code>type<\/code>\u00a0EN10MB\u00a0(Ethernet),\u00a0capture\u00a0size\u00a065535\u00a0bytes<\/code><\/div>\n
1000\u00a0packets\u00a0captured<\/code><\/div>\n
1000\u00a0packets\u00a0received\u00a0by\u00a0filter<\/code><\/div>\n
0\u00a0packets\u00a0dropped\u00a0by\u00a0kernel<\/code><\/div>\n
1420\u00a0IP\u00a0174.7.7.*<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
\n
\n
\u00a0<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7136\u540e\u5c06packets\u8fc7\u591a\u7684IP\u8bb0\u5f55\u4e0b\u6765\uff0c\u7528\u4e0a\u9762\u7684\u65b9\u6cd5\u5c01\u7981\u3002<\/p>\n

\u8fd0\u884c<\/p>\n\n\n\n
\n
\n
service\u00a0iptables\u00a0save<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4fdd\u5b58\u7136\u540e\u91cd\u542f<\/p>\n\n\n\n
\n
\n
iptables\u00a0service\u00a0iptables\u00a0restart<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u4e00\u6b65\u5efa\u8bae\u591a\u8fdb\u884c\u51e0\u6b21\uff0c\u53d1\u73b0\u5f02\u5e38IP\u7528\u4e0a\u9762\u7684\u529e\u6cd5\u5c01\u7981\u3002\u5982\u679c\u51fa\u73b0\u8bef\u5c01\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u8fd9\u884c\u89e3\u5c01\u547d\u4ee4\u8fdb\u884c\u89e3\u5c01<\/p>\n\n\n\n
\n
\n
iptables\u00a0-D\u00a0INPUT\u00a0-s\u00a0222.142.2.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5e38\u7528\u547d\u4ee4<\/strong><\/p>\n

\u5c01\u5355\u4e2aIP\u7684\u547d\u4ee4\u662f\uff1a<\/p>\n\n\n\n
\n
\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0211.1.0.0\u00a0-j\u00a0DROP<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5c01IP\u6bb5\u7684\u547d\u4ee4\u662f\uff1a<\/p>\n\n\n\n
\n
\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0211.1.0.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0211.2.0.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0211.3.0.0<\/code>\/16<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5c01\u6574\u4e2aB\u6bb5\u7684\u547d\u4ee4\u662f\uff1a<\/p>\n\n\n\n
\n
\n
iptables\u00a0-I\u00a0INPUT\u00a0-s\u00a0211.0.0.0<\/code>\/8<\/code>\u00a0-j\u00a0DROP<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u540e\u7eed<\/h2>\n

\u8fdb\u884c\u4e86\u4e0a\u9762\u7684\u64cd\u4f5c\u4e4b\u540e\uff0c\u5ba2\u6237\u7684\u7f51\u7ad9\u6b63\u5e38\u4e86\uff0c\u51e0\u4e4e\u79d2\u5f00\uff0c\u5f53\u7136\u8fd9\u548c\u4ed6\u7684vps\u7ed9\u529b\u4e5f\u6709\u4e00\u5b9a\u7684\u5173\u7cfb\u3002top\u4e86\u4e00\u4e0b\uff0c\u670d\u52a1\u5668\u8d44\u6e90\u4e5f\u6b63\u5e38\u4e86\u3002<\/p>\n

\u4ee5\u4e0a\u65b9\u6cd5\u53ea\u505a\u53c2\u8003\u5177\u4f53\u64cd\u4f5c\u56e0\u60c5\u51b5\u800c\u5b9a,\u591a\u591a\u4e3b\u610f\u7f51\u7edc\u5b89\u5168,\u4e0d\u8981\u7ed9\u9a87\u5ba2\u6709\u673a\u53ef\u4e58\uff01<\/p>\n

\n
<\/div>\n

 <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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