{"id":878,"date":"2016-06-20T16:34:43","date_gmt":"2016-06-20T08:34:43","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=878"},"modified":"2016-06-20T16:34:43","modified_gmt":"2016-06-20T08:34:43","slug":"linux%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%b3%bb%e7%bb%9f%e5%a6%82%e4%bd%95%e8%ae%be%e7%bd%ae%e7%a6%81%e6%ad%a2ping","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/hemanual\/linux%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%b3%bb%e7%bb%9f%e5%a6%82%e4%bd%95%e8%ae%be%e7%bd%ae%e7%a6%81%e6%ad%a2ping\/","title":{"rendered":"Linux\u670d\u52a1\u5668\u7cfb\u7edf\u5982\u4f55\u8bbe\u7f6e\u7981\u6b62ping"},"content":{"rendered":"

ping\u662f\u4e00\u4e2a\u901a\u4fe1\u534f\u8bae\uff0c\u662fip\u534f\u8bae\u7684\u4e00\u90e8\u5206\uff0ctcp\/ip \u534f\u8bae\u7684\u4e00\u90e8\u5206\u3002\u5229\u7528\u5b83\u53ef\u4ee5\u68c0\u67e5\u7f51\u7edc\u662f\u5426\u80fd\u591f\u8fde\u901a\uff0c\u7528\u597d\u5b83\u53ef\u4ee5\u5f88\u597d\u5730\u5e2e\u52a9\u6211\u4eec\u5206\u6790\u5224\u5b9a\u7f51\u7edc\u6545\u969c\u3002\u5e94\u7528\u683c\u5f0f\u4e3a\uff1aPing IP\u5730\u5740\u3002\u4f46\u670d\u52a1\u542f\u7528ping\u6709\u65f6\u5019\u4f1a\u9020\u6210\u5f88\u591a\u9ebb\u70e6\u3002<\/p>\n

\u56e0\u6b64\u6709\u65f6\u5019\u6839\u636e\u9700\u8981\uff08\u5982\u9632\u6b62\u653b\u51fb\uff09\uff0cLinux\u670d\u52a1\u5668\u7ba1\u7406\u5458\u53ef\u9650\u5236\u670d\u52a1\u5668\u7981\u6b62\u5176\u5b83\u7528\u6237Ping\u3002\u540c\u65f6\u53c8\u4fdd\u8bc1Linux\u670d\u52a1\u5668\u53c8\u53ef\u4ee5Ping\u5176\u5b83\u670d\u52a1\u5668.<\/p>\n

\u4e0b\u9762\u4ecb\u7ecd\u51e0\u79cdlinux\u670d\u52a1\u5668\u4e0b\u7981\u6b62ping\u7684\u65b9\u6cd5:<\/p>\n

 <\/p>\n

<1>\u4e34\u65f6\u7684\u7981ping\u65b9\u6cd5:<\/p>\n

\u4ee5\u4e0b2\u79cd\u65b9\u5f0f\u90fd\u662f\u4e34\u65f6\u6709\u6548,\u91cd\u542f\u670d\u52a1\u5668\u8bbe\u7f6e\u5c06\u5931\u6548.<\/p>\n

 <\/p>\n

\u9996\u5148\u767b\u9646\u670d\u52a1\u5668\u7ec8\u7aef\u4ee5\u4e0b\u6267\u884c:<\/p>\n

echo 1 > \/proc\/sys\/net\/ipv4\/icmp_echo_ignore_all<\/p>\n

\u6216\u8005<\/p>\n

sysctl -w net.ipv4.icmp_echo_ignore_all=1<\/p>\n

\u8fd9\u6837\u5c31\u53ef\u4ee5\u7981ping\u4e86;<\/p>\n

 <\/p>\n

\u5982\u679c\u60f3\u6062\u590dping\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4:<\/p>\n

echo\u00a00\u00a0>\u00a0\/proc\/sys\/net\/ipv4\/icmp_echo_ignore_all<\/p>\n

\u6216\u8005<\/p>\n

sysctl -w net.ipv4.icmp_echo_ignore_all=0<\/p>\n

 <\/p>\n

\u4ee5\u4e0a\u4fee\u6539\u540e,\u5747\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u4ee5\u4e0b\u6587\u4ef6\u6765\u67e5\u770b\u8bbe\u7f6e<\/p>\n

vi \/proc\/sys\/net\/ipv4\/icmp_echo_ignore_all<\/p>\n

\u4f46\u662f,\u8be5\u6587\u4ef6\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539!<\/p>\n

 <\/p>\n

<2>\u6c38\u4e45\u7981ping\u65b9\u6cd5<\/p>\n

\u82e5\u60f3\u6c38\u4e45\u5b9e\u73b0\u7981ping,\u53ef\u4ee5\u4fee\u6539\/etc\/sysctl.conf\u6587\u4ef6,\u5982\u4e0b:<\/p>\n

vi \/etc\/sysctl.conf<\/p>\n

net.ipv4.icmp_echo_ignore_all = 1 \u00a0\u00a0\/\/\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a0.<\/p>\n

 <\/p>\n

\u4ee5\u4e0a\u64cd\u4f5c,\u8fd8\u662f\u6709\u524d\u63d0\u7684,\u82e5\u4e3b\u673a\u672c\u8eab\u81ea\u5e26\u9632\u706b\u5899iptables\u4e2dINPUT\u3001OUTPUT\u9ed8\u8ba4\u7b56\u7565\u4e3aACCEPT,\u90a3\u4e48\u4e3b\u673a\u9ed8\u8ba4\u662f\u5141\u8bb8ping.\u5219\u53ef\u4ee5\u76f4\u63a5\u505a\u4ee5\u4e0a\u4fee\u6539,\u5373\u53ef\u8d77\u5230\u4e34\u65f6\u6216\u6c38\u4e45\u7981ping\u6548\u679c.<\/p>\n

\u82e5iptables\u4e2dINPUT\u3001OUTPUT\u9ed8\u8ba4\u7b56\u7565\u5747\u4e3aDROP\u65f6,\u90a3\u4e48\u4e3b\u673a\u672c\u8eab\u9ed8\u8ba4\u5df2\u7ecf\u7981ping,\u5219\u65e0\u9700\u505a\u4ee5\u4e0a\u4fee\u6539\u4e86.<\/p>\n

\u540c\u6837,\u82e5\u9700\u8981\u5f00\u542fping,\u5219\u9700\u8981\u6dfb\u52a0\u76f8\u5e94\u7684\u7b56\u7565.<\/p>\n

\u5982\u4e0b:<\/p>\n

\u82e5iptables\u4e2dINPUT\u3001OUTPUT\u5747\u4e3aDROP\u8bdd,\u5219\u9700\u8981\u6dfb\u52a0:<\/p>\n

iptables -A INPUT -p icmp –icmp-type echo-request -j ACCEPT<\/p>\n

iptables -A OUTPUT -p icmp –icmp-type echo-reply -j ACCEPT<\/p>\n","protected":false},"excerpt":{"rendered":"

ping\u662f\u4e00\u4e2a\u901a\u4fe1\u534f\u8bae\uff0c\u662fip\u534f\u8bae\u7684\u4e00\u90e8\u5206\uff0ctcp\/ip \u534f\u8bae\u7684\u4e00\u90e8\u5206\u3002\u5229\u7528\u5b83\u53ef\u4ee5\u68c0\u67e5\u7f51\u7edc\u662f\u5426\u80fd\u591f\u8fde\u901a\uff0c\u7528\u597d\u5b83 … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,4,49],"tags":[301,38,300],"class_list":["post-878","post","type-post","status-publish","format-standard","hentry","category-hemanual","category-hefaq","category-linux","tag-iptables","tag-linux","tag-ping-sysctl"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=878"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/878\/revisions"}],"predecessor-version":[{"id":879,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/878\/revisions\/879"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}