{"id":6340,"date":"2014-05-23T14:10:58","date_gmt":"2014-05-23T06:10:58","guid":{"rendered":"http:\/\/jpuyy.com\/?p=6340"},"modified":"2016-07-17T14:31:30","modified_gmt":"2016-07-17T06:31:30","slug":"linux-network-connections","status":"publish","type":"post","link":"https:\/\/jpuyy.com\/?p=6340","title":{"rendered":"linux\u8fde\u63a5\u6570\u7edf\u8ba1\u67e5\u770b"},"content":{"rendered":"<p>\u5728\u65e5\u5e38\u5de5\u4f5c\u4e2d\u7ecf\u5e38\u8981\u67e5\u770b\u8fde\u63a5\u6570\uff0c\u4ee5\u4e0b\u662f\u51e0\u4e2a\u4f8b\u5b50<\/p>\n<p>\u5148\u5b89\u88c5<\/p>\n<pre>yum install net-tools -y<\/pre>\n<p>\u7edf\u8ba180\u7aef\u53e3\u8fde\u63a5\u6570<\/p>\n<pre>netstat -na | grep -i \"80\" | wc -l<\/pre>\n<p>\u7edf\u8ba1\u5df2\u8fde\u63a5\u4e0a\u7684\uff0c\u72b6\u6001\u4e3a\u201cestablished&#8217;\u7684\u8fde\u63a5\u6570<\/p>\n<pre>netstat -na | grep ESTABLISHED | wc -l<\/pre>\n<p>ESTABLISHED\u6765\u6e90IP\u8bbf\u95ee\u91cf\u524d5\u540d<\/p>\n<pre>netstat -na | grep ESTABLISHED | awk '{print$5}' | awk -F : '{print$1}' | sort | uniq -c | sort -k 1 -n -r | head -n 5<\/pre>\n<p>\u6b63\u5728SYN\u6765\u6e90IP\u8bbf\u95ee\u91cf\u524d5\u540d<\/p>\n<pre>netstat -na | grep SYN | awk '{print$5}' | awk -F : '{print$1}' | sort | uniq -c | sort -k 1 -n -r | head -n 5<\/pre>\n<p>\u5c06\u4e0d\u540c\u7684tcp\u8fde\u63a5\u72b6\u6001\u6253\u5370\u51fa\u6765<\/p>\n<pre>netstat -n | awk '\/^tcp\/ {++S[$NF]} END {for(key in S) print key,\"\\t\",S[key]}'<\/pre>\n<p>&nbsp;<\/p>\n<p>TIME_WAIT \t 257    \u7b49\u5f85\u6240\u6709\u5206\u7ec4\u6b7b\u6389<br \/>\nSYN_SENT \t 2      \u5e94\u7528\u5df2\u7ecf\u5f00\u59cb\uff0c\u6253\u5f00\u4e00\u4e2a\u8fde\u63a5<br \/>\nFIN_WAIT1 \t 49     \u5e94\u7528\u8bf4\u5b83\u5df2\u7ecf\u5b8c\u6210<br \/>\nFIN_WAIT2 \t 60     \u53e6\u4e00\u8fb9\u5df2\u540c\u610f\u91ca\u653e<br \/>\nESTABLISHED \t 509    \u6b63\u5e38\u6570\u636e\u4f20\u8f93\u72b6\u6001\/\u5f53\u524d\u5e76\u53d1\u8fde\u63a5\u6570<br \/>\nSYN_RECV \t 5      \u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42\u5df2\u7ecf\u5230\u8fbe\uff0c\u7b49\u5f85\u786e\u8ba4<br \/>\nCLOSING \t 1      \u65e0\u8fde\u63a5\u662f\u6d3b\u52a8\u7684\u6216\u6b63\u5728\u8fdb\u884c<br \/>\nLAST_ACK \t 37     \u7b49\u5f85\u6240\u6709\u5206\u7ec4\u6b7b\u6389<\/p>\n<p>netstat \u67e5\u770b unix socket \u4f7f\u7528<\/p>\n<pre>netstat -ntlpx<\/pre>\n<p>\u53c2\u8003:http:\/\/www.letuknowit.com\/post\/31.html<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u65e5\u5e38\u5de5\u4f5c\u4e2d\u7ecf\u5e38\u8981\u67e5\u770b\u8fde\u63a5\u6570\uff0c\u4ee5\u4e0b\u662f\u51e0\u4e2a\u4f8b\u5b50 \u5148\u5b89\u88c5 yum install net-tools -y \u7edf\u8ba180\u7aef\u53e3\u8fde\u63a5\u6570 netstat -na | grep -i &#8220;80&#8221; | wc -l \u7edf\u8ba1\u5df2\u8fde\u63a5\u4e0a\u7684\uff0c\u72b6\u6001\u4e3a\u201cestablished&#8217;\u7684\u8fde\u63a5\u6570 netstat -na | grep ESTABLISHED | wc -l ESTABLISHED\u6765\u6e90IP\u8bbf\u95ee\u91cf\u524d5\u540d netstat -na | grep ESTABLISHED | awk &#8216;{print$5}&#8217; | awk -F : &#8216;{print$1}&#8217; | sort | uniq -c | sort -k 1 -n -r | head -n 5 \u6b63\u5728SYN\u6765\u6e90IP\u8bbf\u95ee\u91cf\u524d5\u540d [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-6340","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/posts\/6340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/jpuyy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6340"}],"version-history":[{"count":8,"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/posts\/6340\/revisions"}],"predecessor-version":[{"id":7848,"href":"https:\/\/jpuyy.com\/index.php?rest_route=\/wp\/v2\/posts\/6340\/revisions\/7848"}],"wp:attachment":[{"href":"https:\/\/jpuyy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jpuyy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jpuyy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}