\u53ef\u4ee5\u5728\/proc\/sys\u76ee\u5f55\u4e0b\u627e\u5230\u53ef\u4f9b\u4fee\u6539\u7684\u53c2\u6570\u3002\u56e0\u6b64\uff0cprocfs\uff08\u80fd\u591f\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u4e0e\u5185\u6838\u901a\u4fe1\u7684\u6587\u4ef6\u7cfb\u7edf\u6a21\u62df\uff09\u5bf9\u4e8e\u201csysctl\u201d\u662f\u5fc5\u9700\u7684\u3002\u53ea\u6709root\u7528\u6237\u624d\u80fd\u6267\u884c\u6b64\u547d\u4ee4\u3002<\/p>\n

\u4f7f\u7528sysctl\u547d\u4ee4\u4fee\u6539\u5185\u6838\u53c2\u6570<\/strong><\/div>\n
\u5185\u6838\u53c2\u6570\u53ef\u4ee5\u4e34\u65f6\u6216\u6c38\u4e45\u4fee\u6539\u3002\u5185\u6838\u53c2\u6570\u7684\u4e34\u65f6\u4fee\u6539\u5982\u4e0b\uff1a
\n\u8bfb\u53d6\u5f53\u524d\u5185\u6838\u7684\u53c2\u6570\uff1a<\/p>\n
\r\n[root@localhost ~]# sysctl -a\r\n<\/pre>\n
\u4f7f\u7528-w<\/code>\u4e34\u65f6\u4fee\u6539\u5185\u6838\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u7981\u6b62\u5176\u4ed6\u8bbe\u5907ping\u672c\u673a\uff1a<\/p>\n
\r\n[root@localhost ~]# sysctl -w net.ipv4.icmp_echo_ignore_all=1\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\n<\/pre>\n \n\u503c\u201c 0\u201d\u4ee3\u8868\u201c\u5173\u201d\uff0c\u503c\u201c 1\u201d\u4ee3\u8868\u201c\u5f00\u201d\u3002\u8fd9\u4e9b\u66f4\u6539\u662f\u4e34\u65f6\u7684\uff0c\u91cd\u542f\u7cfb\u7edf\u540e\u91cd\u7f6e\u53c2\u6570\u3002<\/p>\n \u6c38\u4e45\u4fee\u6539\u5185\u6838\u53c2\u6570<\/strong><\/div>\n \u5728\/etc\/sysctl.conf\u6587\u4ef6\u4e2d\u6dfb\u52a0\u53c2\u6570\u548c\u503c\uff0c\u4f8b\u5982\uff0c\u7981\u6b62\u5176\u4ed6\u8bbe\u5907ping\u672c\u673a\uff0c\u4fee\u6539sysctl.conf\u914d\u7f6e\u6587\u4ef6\u540e\uff0c\u9700\u8981\u6267\u884csysctl -p<\/code>\u547d\u4ee4\u4ece\u6587\u4ef6\/etc\/sysctl.conf\u6587\u4ef6\u4e2d\u52a0\u8f7dsysctl\u8bbe\u7f6e\u3002\uff1a<\/p>\n \r\n[root@localhost ~]# echo \"net.ipv4.icmp_echo_ignore_all = 1\" >> \/etc\/sysctl.conf \r\n[root@localhost ~]# sysctl -p\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\n<\/pre>\n<\/p>\n \u51e0\u4e2asysctl\u4f7f\u7528\u5b9e\u4f8b<\/strong><\/div>\n\u63a7\u5236\u6570\u636e\u5305\u8f6c\u53d1<\/strong><\/span><\/div>\n\u4ec5\u5728\u5145\u5f53\u7f51\u5173\u7684\u670d\u52a1\u5668\u4e0a\u542f\u7528IP\u6570\u636e\u5305\u8f6c\u53d1\u3002\u5728\u5176\u4ed6\u670d\u52a1\u5668\u4e2d\uff0c\u53ef\u4ee5\u7981\u7528\u6b64\u529f\u80fd\u3002<\/p>\n \r\n[root@localhost ~]# echo \"net.ipv4.ip_forward = 0\" >> \/etc\/sysctl.conf \r\n[root@localhost ~]# sysctl -p\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\nnet.ipv4.ip_forward = 0\r\n<\/pre>\n<\/p>\n \u505c\u7528swap\u5206\u533a<\/strong><\/span><\/div>\n\u5728\u4f7f\u7528kubernetes\u73af\u5883\u7684\u65f6\u5019\u9700\u8981\u5173\u6389swap\u5206\u533a\uff0c\u4e3a\u4e86\u6027\u80fd\u8003\u8651\u3002<\/p>\n \r\n[root@localhost ~]# echo \"vm.swappiness = 0\" >> \/etc\/sysctl.conf \r\n[root@localhost ~]# sysctl -p\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\nnet.ipv4.ip_forward = 0\r\nvm.swappiness = 0\r\n<\/pre>\n<\/p>\n SYN\u9632\u6d2a<\/strong><\/span><\/div>\n\u9632\u6b62SYN Flood\u653b\u51fb\uff0c\u9700\u8981\u5f00\u542f\u6b64\u9879\u3002<\/p>\n \r\n[root@localhost ~]# echo \"net.ipv4.tcp_syncookies = 1\" >> \/etc\/sysctl.conf \r\n[root@localhost ~]# sysctl -p\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\nnet.ipv4.ip_forward = 0\r\nvm.swappiness = 0\r\nnet.ipv4.tcp_syncookies = 1\r\n<\/pre>\n<\/p>\n \u5141\u8bb8\u7cfb\u7edf\u6253\u5f00\u7684\u7aef\u53e3\u8303\u56f4<\/strong><\/span><\/div>\n\r\n[root@localhost ~]# echo \"net.ipv4.ip_local_port_range = 1024 65000\" >> \/etc\/sysctl.conf \r\n[root@localhost ~]# sysctl -p\r\nnet.ipv4.icmp_echo_ignore_all = 1\r\nnet.ipv4.ip_forward = 0\r\nvm.swappiness = 0\r\nnet.ipv4.tcp_syncookies = 1\r\nnet.ipv4.ip_local_port_range = 1024 65000\r\n<\/pre>\n<\/p>\n \u603b\u7ed3<\/strong><\/div>\nSysctl\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u5728\u5185\u6838\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u4fee\u6539\u5185\u6838\u7684\u53c2\u6570\uff0c\u5728\u8fd9\u4e2a\u547d\u4ee4\u7684\u5e2e\u52a9\u4e0b\uff0c\u53ef\u4ee5\u4fee\u6539\u5185\u6838\u53c2\u6570\uff0c\u800c\u65e0\u9700\u91cd\u65b0\u7f16\u8bd1\u5185\u6838\u6216\u91cd\u542f\u7cfb\u7edf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u53ef\u4ee5\u5728\/proc\/sys\u76ee\u5f55\u4e0b\u627e\u5230\u53ef\u4f9b\u4fee\u6539\u7684\u53c2\u6570\u3002\u56e0\u6b64\uff0cprocfs\uff08\u80fd\u591f\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u4e0e\u5185\u6838\u901a\u4fe1\u7684\u6587\u4ef6\u7cfb\u7edf\u6a21\u62df […]<\/p>\n","protected":false},"author":362,"featured_media":196585,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-196584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/196584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/362"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=196584"}],"version-history":[{"count":5,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/196584\/revisions"}],"predecessor-version":[{"id":196596,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/196584\/revisions\/196596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/196585"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=196584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=196584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=196584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}