{"id":43662,"date":"2024-10-06T02:27:35","date_gmt":"2024-10-05T18:27:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/43662\/"},"modified":"2024-10-06T02:27:35","modified_gmt":"2024-10-05T18:27:35","slug":"centos-7-%e7%a6%81%e6%ad%a2-ping-%e7%9a%84%e5%b9%be%e7%a8%ae%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/43662\/","title":{"rendered":"CentOS 7 \u7981\u6b62 ping \u7684\u5e7e\u7a2e\u65b9\u5f0f"},"content":{"rendered":"<h1 id=\"centos-7-%e7%a6%81%e6%ad%a2-ping-%e7%9a%84%e5%b9%be%e7%a8%ae%e6%96%b9%e5%bc%8f-GFqVDSpSth\">CentOS 7 \u7981\u6b62 Ping \u7684\u5e7e\u7a2e\u65b9\u5f0f<\/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\u6b62\u5916\u90e8\u5c0d\u4f3a\u670d\u5668\u9032\u884c Ping \u64cd\u4f5c\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u5b89\u5168\u63aa\u65bd\u3002\u9019\u4e0d\u50c5\u53ef\u4ee5\u9632\u6b62\u6f5b\u5728\u7684\u653b\u64ca\u8005\u7372\u53d6\u4f3a\u670d\u5668\u7684\u5b58\u5728\u4fe1\u606f\uff0c\u9084\u80fd\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u7db2\u7d61\u6d41\u91cf\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u5728 CentOS 7 \u4e2d\u7981\u6b62 Ping \u7684\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e6%96%b9%e6%b3%95%e4%b8%80%ef%bc%9a%e4%bd%bf%e7%94%a8%e9%98%b2%e7%81%ab%e7%89%86%ef%bc%88firewalld%ef%bc%89-GFqVDSpSth\">\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528\u9632\u706b\u7246\uff08firewalld\uff09<\/h2>\n<p>CentOS 7 \u9810\u8a2d\u4f7f\u7528 firewalld \u4f5c\u70ba\u9632\u706b\u7246\u7ba1\u7406\u5de5\u5177\u3002\u901a\u904e firewalld\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7981\u6b62 ICMP Echo \u8acb\u6c42\uff08\u5373 Ping\uff09\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u6b65\u9a5f\uff1a<\/p>\n<pre><code>sudo firewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"0.0.0.0\/0\" reject icmp type echo-request'<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u7684\u610f\u601d\u662f\u62d2\u7d55\u6240\u6709\u4f86\u81ea\u4efb\u4f55 IP \u5730\u5740\u7684 ICMP Echo \u8acb\u6c42\u3002\u57f7\u884c\u5b8c\u7562\u5f8c\uff0c\u8a18\u5f97\u91cd\u65b0\u8f09\u5165\u9632\u706b\u7246\u914d\u7f6e\uff1a<\/p>\n<pre><code>sudo firewall-cmd --reload<\/code><\/pre>\n<h2 id=\"%e6%96%b9%e6%b3%95%e4%ba%8c%ef%bc%9a%e4%bd%bf%e7%94%a8-iptables-GFqVDSpSth\">\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 iptables<\/h2>\n<p>\u5982\u679c\u60a8\u66f4\u559c\u6b61\u4f7f\u7528 iptables \u4f86\u7ba1\u7406\u9632\u706b\u7246\uff0c\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u4f86\u7981\u6b62 Ping\uff1a<\/p>\n<pre><code>sudo iptables -A INPUT -p icmp --icmp-type echo-request -j DROP<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u5c07\u6240\u6709\u7684 ICMP Echo \u8acb\u6c42\u4e1f\u68c4\u3002\u70ba\u4e86\u78ba\u4fdd\u9019\u500b\u898f\u5247\u5728\u91cd\u555f\u5f8c\u4f9d\u7136\u6709\u6548\uff0c\u60a8\u9700\u8981\u4fdd\u5b58 iptables \u7684\u914d\u7f6e\uff1a<\/p>\n<pre><code>sudo service iptables save<\/code><\/pre>\n<h2 id=\"%e6%96%b9%e6%b3%95%e4%b8%89%ef%bc%9a%e4%bf%ae%e6%94%b9-sysctl-%e8%a8%ad%e7%bd%ae-GFqVDSpSth\">\u65b9\u6cd5\u4e09\uff1a\u4fee\u6539 sysctl \u8a2d\u7f6e<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528\u9632\u706b\u7246\uff0c\u60a8\u9084\u53ef\u4ee5\u901a\u904e\u4fee\u6539\u7cfb\u7d71\u53c3\u6578\u4f86\u7981\u6b62 Ping\u3002\u9019\u53ef\u4ee5\u901a\u904e\u7de8\u8f2f sysctl.conf \u6587\u4ef6\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>sudo vi \/etc\/sysctl.conf<\/code><\/pre>\n<p>\u5728\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u884c\uff1a<\/p>\n<pre><code>net.ipv4.icmp_echo_ignore_all = 1<\/code><\/pre>\n<p>\u9019\u689d\u8a2d\u7f6e\u6703\u544a\u8a34\u7cfb\u7d71\u5ffd\u7565\u6240\u6709\u7684 ICMP Echo \u8acb\u6c42\u3002\u4fee\u6539\u5b8c\u6210\u5f8c\uff0c\u57f7\u884c\u4ee5\u4e0b\u547d\u4ee4\u4f7f\u6539\u52d5\u751f\u6548\uff1a<\/p>\n<pre><code>sudo sysctl -p<\/code><\/pre>\n<h2 id=\"%e6%96%b9%e6%b3%95%e5%9b%9b%ef%bc%9a%e4%bd%bf%e7%94%a8-selinux-GFqVDSpSth\">\u65b9\u6cd5\u56db\uff1a\u4f7f\u7528 SELinux<\/h2>\n<p>\u5982\u679c\u60a8\u7684 CentOS 7 \u7cfb\u7d71\u555f\u7528\u4e86 SELinux\uff0c\u60a8\u4e5f\u53ef\u4ee5\u901a\u904e SELinux \u7684\u7b56\u7565\u4f86\u7981\u6b62 Ping\u3002\u9996\u5148\uff0c\u6aa2\u67e5 SELinux \u7684\u72c0\u614b\uff1a<\/p>\n<pre><code>sestatus<\/code><\/pre>\n<p>\u5982\u679c SELinux \u8655\u65bc\u555f\u7528\u72c0\u614b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u7981\u6b62 ICMP Echo \u8acb\u6c42\uff1a<\/p>\n<pre><code>sudo setsebool -P deny_icmp_echo 1<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GFqVDSpSth\">\u7e3d\u7d50<\/h2>\n<p>\u5728 CentOS 7 \u4e2d\uff0c\u6709\u591a\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u7981\u6b62 Ping \u64cd\u4f5c\uff0c\u5305\u62ec\u4f7f\u7528\u9632\u706b\u7246\u3001iptables\u3001sysctl \u8a2d\u7f6e\u4ee5\u53ca SELinux \u7b56\u7565\u3002\u6839\u64da\u60a8\u7684\u9700\u6c42\u548c\u74b0\u5883\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4f3a\u670d\u5668\u7684\u5b89\u5168\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u5b89\u5168\u6027\u7684\u74b0\u5883\uff0c\u5efa\u8b70\u7d50\u5408\u591a\u7a2e\u65b9\u6cd5\u4f86\u9054\u5230\u6700\u4f73\u6548\u679c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\u7528\u6236\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u5b89\u5168\u7684\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 CentOS 7 \u4e2d\u7981\u6b62 ping \u7684\u5e7e\u7a2e\u65b9\u6cd5\uff0c\u63d0\u5347\u7cfb\u7d71\u5b89\u5168\u6027\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-43662","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43662","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=43662"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43662\/revisions"}],"predecessor-version":[{"id":43663,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43662\/revisions\/43663"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=43662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=43662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=43662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}