{"id":5490,"date":"2016-10-26T06:16:18","date_gmt":"2016-10-26T06:16:18","guid":{"rendered":"https:\/\/cpanelplesk.com\/wp62\/?p=5490"},"modified":"2021-02-02T06:35:08","modified_gmt":"2021-02-02T06:35:08","slug":"enablecheck-tuntap-module-vpsopenvz","status":"publish","type":"post","link":"https:\/\/cpanelplesk.com\/wp62\/enablecheck-tuntap-module-vpsopenvz\/","title":{"rendered":"How to Enable\/Check TUN\/TAP module in VPS(OpenVZ)"},"content":{"rendered":"<p><span style=\"color: #000000;\">TUN\/TAP are the virtual-network kernel devices. TUN is the short of network TUNnel and TAP is the short of network tap. The TUN simulates a network layer device and it works with layer 3 packets like IP packets.<!--more--><\/span><\/p>\n<p><span style=\"color: #000000;\"> TAP simulates a link layer device and it works with layer 2 packets like Ethernet frames. TUN is used with routing and TAP is used for creating a network bridge.<\/span><\/p>\n<p><span style=\"color: #000000;\">These modules are need to be enabled in VPS for VPN configuration. In this article i will define a simple steps to find out whether TUP\/TAP is enabled or disabled on your VPS.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>Step 1:<\/strong> Login to your VPS via SSH<\/span><br \/>\n<span style=\"color: #000000;\"><strong>Step 2:<\/strong> Run this command:<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># cat \/dev\/net\/tun\r\ncat: \/dev\/net\/tun: File descriptor in bad state<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">The above output should be returned if TUN\/TAP is enabled for VPS. If you get any output other than the above it means TUN\/TAP is not enabled or has problem with TUN\/TAP kernal module.<\/span><\/p>\n<h2><span style=\"color: #000000;\">How to enable TUN\/TAP in OpenVZ?<\/span><\/h2>\n<p><span style=\"color: #000000;\"><strong>Step 1:<\/strong> Login to Node via SSH<\/span><br \/>\n<span style=\"color: #000000;\"><strong> Step 2:<\/strong> Run the below command to find out if tun module is already loaded or not<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>lsmod | grep tun<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">If the above command returns a blank output it means the TUN module is not loaded in your Node.<\/span><\/p>\n<p><span style=\"color: #000000;\">Now Run the below command to load TUN module.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>modprobe tun\r\nlsmod | grep tun<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\"><strong>Step 3:<\/strong> Enabling TUN\/TAP on VPS<\/span><\/p>\n<p><span style=\"color: #000000;\">To make sure that tun module will be loaded automatically on every reboot you can also add it into<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>\/etc\/modules.conf (on RHEL see \/etc\/sysconfig\/modules\/ directory)<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">or into<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>\/etc\/sysconfig\/vz-scripts\/VPSID.mount. (echo \u2018modprobe tun\u2019 &gt;&gt; \r\n\/etc\/sysconfig\/vz-scripts\/VPSID.mount)<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Now time to allow the container to use the tun\/tap device by running the following commands on the host node:<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>vzctl set 101 --devnodes net\/tun:rw --save\r\nvzctl set 101 --devices c:10:200:rw --save\r\nvzctl stop 101\r\nvzctl set 101 --capability net_admin:on --save\r\nvzctl start 101\r\nvzctl exec 101 mkdir -p \/dev\/net\r\nvzctl exec 101 chmod 600 \/dev\/net\/tun<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">That&#8217;s all we have to do.\u00a0 You also like to know<\/span>\u00a0<a href=\"https:\/\/cpanelplesk.com\/wp62\/create-openvpn-server-centos-6-x\/\">How To Create OpenVPN Server On CentOS 6.X<\/a>, <span style=\"color: #000000;\">Please check that and also\u00a0Give your opinion below if you experience any issues or to discuss your ideas and experiences.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>TUN\/TAP are the virtual-network kernel devices. TUN is the short of network TUNnel and TAP is the short of network tap. The TUN simulates a network layer device and it works with layer 3 packets like IP packets. [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/cpanelplesk.com\/wp62\/enablecheck-tuntap-module-vpsopenvz\/\">Continue Reading&#8230;<\/a><\/p>\n","protected":false},"author":2,"featured_media":5493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-5490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Enable\/Check TUN\/TAP module in VPS(OpenVZ) - cPanel Plesk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cpanelplesk.com\/wp62\/enablecheck-tuntap-module-vpsopenvz\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"How to Enable\/Check TUN\/TAP module in VPS(OpenVZ) - cPanel Plesk\" \/>\n<meta name=\"twitter:description\" content=\"TUN\/TAP are the virtual-network kernel devices. 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