{"id":29,"date":"2009-09-02T14:57:52","date_gmt":"2009-09-02T14:57:52","guid":{"rendered":"http:\/\/brucetimberlake.com\/blog\/?p=29"},"modified":"2009-09-02T14:59:53","modified_gmt":"2009-09-02T14:59:53","slug":"one-liner-to-count-current-ip-connections","status":"publish","type":"post","link":"https:\/\/brucetimberlake.com\/blog\/2009\/09\/02\/one-liner-to-count-current-ip-connections\/","title":{"rendered":"One-liner to count current IP connections"},"content":{"rendered":"<p>A quick one-liner to show the IP addresses with an established connection to your server, sorted in order:<\/p>\n<p><code>netstat -ant | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -nr<\/code><\/p>\n<p>If you care only about a certain TCP port, say 80 for web traffic, the command becomes:<\/p>\n<p><code>netstat -ant | grep :80 | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -nr<\/code><\/p>\n<p>Output would look like:<\/p>\n<p><code><br \/>\n36 14.21.23.10<br \/>\n8 14.21.23.107<br \/>\n7 14.21.23.114<br \/>\n6 14.21.2.34<br \/>\n5 14.21.23.108<br \/>\n5 14.21.23.106<br \/>\n5<br \/>\n2 14.21.13.120<br \/>\n1 14.21.2.23<br \/>\n1 14.21.13.147<br \/>\n1 14.21.13.130<br \/>\n1 14.21.13.128<br \/>\n1 14.21.13.122<br \/>\n1 14.21.13.118<br \/>\n1 14.21.13.112<\/p>\n<p><\/code><!--more--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A quick one-liner to show the IP addresses with an established connection to your server, sorted in order: netstat -ant | grep ESTABLISHED | awk &#8216;{print $5}&#8217; | awk -F: &#8216;{print $1}&#8217; | sort | uniq -c | sort -nr If you care only about a certain TCP port, say 80 for web traffic, the &hellip; <a href=\"https:\/\/brucetimberlake.com\/blog\/2009\/09\/02\/one-liner-to-count-current-ip-connections\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;One-liner to count current IP connections&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-29","post","type-post","status-publish","format-standard","hentry","category-sysadmin"],"_links":{"self":[{"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/posts\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/comments?post=29"}],"version-history":[{"count":3,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/posts\/29\/revisions"}],"predecessor-version":[{"id":31,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/posts\/29\/revisions\/31"}],"wp:attachment":[{"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/media?parent=29"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/categories?post=29"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brucetimberlake.com\/blog\/wp-json\/wp\/v2\/tags?post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}