{"id":43804,"date":"2024-10-06T10:40:13","date_gmt":"2024-10-06T02:40:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/43804\/"},"modified":"2024-10-06T10:40:13","modified_gmt":"2024-10-06T02:40:13","slug":"centos-7-%e7%a6%81-ping-%e7%9a%84%e8%be%a6%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/43804\/","title":{"rendered":"CentOS 7 \u7981 ping \u7684\u8fa6\u6cd5"},"content":{"rendered":"<h1 id=\"centos-7-%e7%a6%81-ping-%e7%9a%84%e8%be%a6%e6%b3%95-njPokgILFE\">CentOS 7 \u7981 ping \u7684\u8fa6\u6cd5<\/h1>\n<p>\u5728\u4f3a\u670d\u5668\u7ba1\u7406\u4e2d\uff0c\u5b89\u5168\u6027\u662f\u6bcf\u4f4d\u7ba1\u7406\u54e1\u5fc5\u9808\u91cd\u8996\u7684\u8ab2\u984c\u4e4b\u4e00\u3002\u5c0d\u65bc\u4f7f\u7528 CentOS 7 \u7684\u4f3a\u670d\u5668\u4f86\u8aaa\uff0c\u7981\u7528 ping\uff08ICMP \u56de\u61c9\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u5b89\u5168\u63aa\u65bd\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u6f5b\u5728\u7684\u653b\u64ca\u9762\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 CentOS 7 \u4e2d\u7981\u7528 ping \u7684\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u6b65\u9a5f\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e8%a6%81%e7%a6%81%e7%94%a8-ping%ef%bc%9f-njPokgILFE\">\u70ba\u4ec0\u9ebc\u8981\u7981\u7528 ping\uff1f<\/h2>\n<p>\u7981\u7528 ping \u7684\u4e3b\u8981\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6e1b\u5c11\u653b\u64ca\u9762\uff1a<\/strong>\u653b\u64ca\u8005\u53ef\u4ee5\u5229\u7528 ping \u547d\u4ee4\u4f86\u63a2\u6e2c\u4f3a\u670d\u5668\u7684\u5b58\u5728\uff0c\u9032\u800c\u9032\u884c\u66f4\u6df1\u5165\u7684\u653b\u64ca\u3002<\/li>\n<li><strong>\u9632\u6b62 DDoS \u653b\u64ca\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u653b\u64ca\u8005\u53ef\u80fd\u6703\u5229\u7528 ICMP \u5c01\u5305\u767c\u8d77\u5206\u6563\u5f0f\u62d2\u7d55\u670d\u52d9\u653b\u64ca\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u96b1\u79c1\u6027\uff1a<\/strong>\u7981\u7528 ping \u53ef\u4ee5\u4f7f\u4f3a\u670d\u5668\u7684\u5b58\u5728\u66f4\u52a0\u96b1\u853d\uff0c\u964d\u4f4e\u88ab\u6383\u63cf\u7684\u98a8\u96aa\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a6%81%e7%94%a8-ping-%e7%9a%84%e6%96%b9%e6%b3%95-njPokgILFE\">\u7981\u7528 ping \u7684\u65b9\u6cd5<\/h2>\n<p>\u5728 CentOS 7 \u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u4fee\u6539\u9632\u706b\u7246\u898f\u5247\u4f86\u7981\u7528 ping\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-1%ef%bc%9a%e6%aa%a2%e6%9f%a5%e9%98%b2%e7%81%ab%e7%89%86%e7%8b%80%e6%85%8b-njPokgILFE\">\u6b65\u9a5f 1\uff1a\u6aa2\u67e5\u9632\u706b\u7246\u72c0\u614b<\/h3>\n<pre><code>sudo firewall-cmd --state<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u9632\u706b\u7246\u7684\u72c0\u614b\uff0c\u78ba\u4fdd\u9632\u706b\u7246\u6b63\u5728\u904b\u884c\u3002\u5982\u679c\u986f\u793a\u70ba &#8220;running&#8221;\uff0c\u5247\u53ef\u4ee5\u7e7c\u7e8c\u9032\u884c\u4e0b\u4e00\u6b65\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-2%ef%bc%9a%e7%a6%81%e7%94%a8-icmp-%e5%9b%9e%e6%87%89-njPokgILFE\">\u6b65\u9a5f 2\uff1a\u7981\u7528 ICMP \u56de\u61c9<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u7981\u7528 ICMP \u56de\u61c9\uff1a<\/p>\n<pre><code>sudo firewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"0.0.0.0\/0\" reject'<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u62d2\u7d55\u6240\u6709\u4f86\u81ea IPv4 \u7684 ICMP \u5c01\u5305\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-3%ef%bc%9a%e9%87%8d%e6%96%b0%e5%8a%a0%e8%bc%89%e9%98%b2%e7%81%ab%e7%89%86-njPokgILFE\">\u6b65\u9a5f 3\uff1a\u91cd\u65b0\u52a0\u8f09\u9632\u706b\u7246<\/h3>\n<pre><code>sudo firewall-cmd --reload<\/code><\/pre>\n<p>\u5728\u4fee\u6539\u9632\u706b\u7246\u898f\u5247\u5f8c\uff0c\u5fc5\u9808\u91cd\u65b0\u52a0\u8f09\u9632\u706b\u7246\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-4%ef%bc%9a%e9%a9%97%e8%ad%89%e8%a8%ad%e7%bd%ae-njPokgILFE\">\u6b65\u9a5f 4\uff1a\u9a57\u8b49\u8a2d\u7f6e<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u9a57\u8b49 ping \u662f\u5426\u5df2\u88ab\u7981\u7528\uff1a<\/p>\n<pre><code>ping -c 4 your_server_ip<\/code><\/pre>\n<p>\u5982\u679c\u4f3a\u670d\u5668\u5df2\u6210\u529f\u7981\u7528 ping\uff0c\u5247\u61c9\u8a72\u6703\u6536\u5230 &#8220;Destination Host Unreachable&#8221; \u6216 &#8220;Request timed out&#8221; \u7684\u6d88\u606f\u3002<\/p>\n<h2 id=\"%e5%85%b6%e4%bb%96%e5%ae%89%e5%85%a8%e6%8e%aa%e6%96%bd-njPokgILFE\">\u5176\u4ed6\u5b89\u5168\u63aa\u65bd<\/h2>\n<p>\u9664\u4e86\u7981\u7528 ping\uff0c\u9084\u6709\u5176\u4ed6\u4e00\u4e9b\u5b89\u5168\u63aa\u65bd\u53ef\u4ee5\u9032\u4e00\u6b65\u4fdd\u8b77 CentOS 7 \u4f3a\u670d\u5668\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528 SSH \u5bc6\u9470\u767b\u9304\uff1a<\/strong>\u907f\u514d\u4f7f\u7528\u5bc6\u78bc\u767b\u9304\uff0c\u6539\u7528 SSH \u5bc6\u9470\u4ee5\u63d0\u9ad8\u5b89\u5168\u6027\u3002<\/li>\n<li><strong>\u5b9a\u671f\u66f4\u65b0\u7cfb\u7d71\uff1a<\/strong>\u4fdd\u6301\u7cfb\u7d71\u548c\u61c9\u7528\u7a0b\u5e8f\u7684\u6700\u65b0\u7248\u672c\uff0c\u4ee5\u4fee\u88dc\u5df2\u77e5\u7684\u5b89\u5168\u6f0f\u6d1e\u3002<\/li>\n<li><strong>\u914d\u7f6e\u9632\u706b\u7246\uff1a<\/strong>\u6839\u64da\u9700\u8981\u914d\u7f6e\u9632\u706b\u7246\u898f\u5247\uff0c\u50c5\u5141\u8a31\u5fc5\u8981\u7684\u6d41\u91cf\u9032\u5165\u4f3a\u670d\u5668\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-njPokgILFE\">\u7e3d\u7d50<\/h2>\n<p>\u7981\u7528 ping \u662f\u63d0\u9ad8 CentOS 7 \u4f3a\u670d\u5668\u5b89\u5168\u6027\u7684\u4e00\u500b\u6709\u6548\u63aa\u65bd\u3002\u901a\u904e\u7c21\u55ae\u7684\u9632\u706b\u7246\u914d\u7f6e\uff0c\u7ba1\u7406\u54e1\u53ef\u4ee5\u6e1b\u5c11\u6f5b\u5728\u7684\u653b\u64ca\u9762\uff0c\u4fdd\u8b77\u4f3a\u670d\u5668\u4e0d\u53d7\u4e0d\u5fc5\u8981\u7684\u63a2\u6e2c\u548c\u653b\u64ca\u3002\u9664\u4e86\u7981\u7528 ping\uff0c\u9084\u61c9\u8003\u616e\u5176\u4ed6\u5b89\u5168\u63aa\u65bd\uff0c\u4ee5\u78ba\u4fdd\u4f3a\u670d\u5668\u7684\u6574\u9ad4\u5b89\u5168\u6027\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728 CentOS 7 \u4e2d\u7981\u7528 ping \u547d\u4ee4\uff0c\u4fdd\u8b77\u4f3a\u670d\u5668\u5b89\u5168\uff0c\u9632\u6b62\u4e0d\u5fc5\u8981\u7684\u7db2\u7d61\u63a2\u6e2c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-43804","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43804","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=43804"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43804\/revisions"}],"predecessor-version":[{"id":43805,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43804\/revisions\/43805"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=43804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=43804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=43804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}