{"id":3270,"date":"2008-04-11T16:20:56","date_gmt":"2008-04-11T07:20:56","guid":{"rendered":"https:\/\/www.pistolfly.com\/weblog\/?p=3270"},"modified":"2017-07-31T12:21:15","modified_gmt":"2017-07-31T03:21:15","slug":"allowing-ftp-with-iptables","status":"publish","type":"post","link":"https:\/\/www.pistolfly.com\/weblog\/en\/2008\/04\/allowing-ftp-with-iptables.html","title":{"rendered":"Allowing ftp with iptables"},"content":{"rendered":"<p>When you allow ftp with iptables, allowing port 21 like below is not enough to accept LIST command.<\/p>\n<pre class=\"command-line\"># iptables -A INPUT -p tcp --dport 21 -j ACCEPT\r\n<\/pre>\n<p>You need to load 2 modules ip_conntrack_ftp and ip_nat_ftp.<br \/>\nEdit \/etc\/sysconfig\/iptables-config and add the following and they will be loaded automatically.<\/p>\n<pre>IPTABLES_MODULES=\"ip_conntrack_ftp ip_nat_ftp\"\r\n<\/pre>\n<p>Then restart iptables.<\/p>\n<pre class=\"command-line\"># service iptables restart\r\n<\/pre>\n<p>Make sure the modules are loaded.<\/p>\n<pre class=\"command-line\"># lsmod\r\nModule                  Size  Used by\r\nnf_nat_ftp              7361  0 \r\nnf_conntrack_ftp       13761  1 nf_nat_ftp\r\n...(omit)\r\n<\/pre>\n<p>Source: <a href=\"http:\/\/www.ksknet.net\/cat13\/iptablesftp.html\" target=\"_blank\">iptables\u3067ftp\u3092\u901a\u3059<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When you allow ftp with iptables, allowing port 21 like below is not enough to accept LIST command. # iptables &hellip; <a href=\"https:\/\/www.pistolfly.com\/weblog\/en\/2008\/04\/allowing-ftp-with-iptables.html\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Allowing ftp with iptables<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"547","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3270","post","type-post","status-publish","format-standard","hentry","category-linux","en-US"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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