{"id":205,"date":"2008-09-19T18:42:00","date_gmt":"2008-09-19T18:42:00","guid":{"rendered":"http:\/\/blog.trungson.com\/?p=205"},"modified":"2008-09-19T18:42:00","modified_gmt":"2008-09-19T18:42:00","slug":"ip_conntrack-and-dropped-packets","status":"publish","type":"post","link":"http:\/\/blog.trungson.com\/?p=205","title":{"rendered":"ip_conntrack and dropped packets"},"content":{"rendered":"<p>For busy servers, ip_conntrack can fill up quickly and must be monitored or you will get intermittent packet drops. Check var\/log\/messages for these error messages. Couple values can be adjusted to the kernel:<\/p>\n<pre>\nmore \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_count\nmore \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_max\n=> count should be less than max, if it's near the maximum value, increase max\n\nmore \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_tcp_timeout_established\n=> default 5 days, might want to lower it\n\necho 0 > \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_tcp_loose\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>For busy servers, ip_conntrack can fill up quickly and must be monitored or you will get intermittent packet drops. Check var\/log\/messages for these error messages. Couple values can be adjusted to the kernel: more \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_count more \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_max => count should be less than max, if it&#8217;s near the maximum value, increase max more \/proc\/sys\/net\/ipv4\/netfilter\/ip_conntrack_tcp_timeout_established => [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.trungson.com\/index.php?rest_route=\/wp\/v2\/posts\/205"}],"collection":[{"href":"http:\/\/blog.trungson.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.trungson.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.trungson.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.trungson.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=205"}],"version-history":[{"count":0,"href":"http:\/\/blog.trungson.com\/index.php?rest_route=\/wp\/v2\/posts\/205\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.trungson.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.trungson.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=205"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.trungson.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}