{"id":513,"date":"2024-08-18T08:46:48","date_gmt":"2024-08-18T07:46:48","guid":{"rendered":"https:\/\/www.morong.info\/?p=513"},"modified":"2024-08-18T08:46:50","modified_gmt":"2024-08-18T07:46:50","slug":"error-720-cant-connect-to-a-vpn-connection-when-you-try-to-establish-a-vpn-connection","status":"publish","type":"post","link":"https:\/\/www.morong.info\/?p=513","title":{"rendered":"&#8222;Error 720: Can&#8217;t connect to a VPN Connection&#8220; when you try to establish a VPN connection"},"content":{"rendered":"\n<p><strong>&#8222;<\/strong><strong>Error 720: Can&#8217;t connect to a VPN Connection&#8220; when you try to establish a VPN connection<\/strong><strong><\/strong><\/p>\n\n\n\n<p>This article discusses how to troubleshoot error 720 that occurs when you try to establish a VPN connection.<\/p>\n\n\n\n<p><strong>Symptoms<\/strong><\/p>\n\n\n\n<p>When you try to establish a VPN connection, you receive the following error message:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/vpn_error.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"552\" height=\"318\" src=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/vpn_error.jpg\" alt=\"\" class=\"wp-image-514\" srcset=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/vpn_error.jpg 552w, https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/vpn_error-300x173.jpg 300w\" sizes=\"auto, (max-width: 552px) 100vw, 552px\" \/><\/a><\/figure>\n\n\n\n<p>Additionally, RasClient event ID 20227 (that mentions error 720) is recorded in the Application log:<\/p>\n\n\n\n<p>Log Name: Application<\/p>\n\n\n\n<p>Source: Ras Client<\/p>\n\n\n\n<p>Event ID: 20227<\/p>\n\n\n\n<p>Description: The user dialed a connection named VPN Connection which has failed. The error code returned on failure is 720.<\/p>\n\n\n\n<p><strong>Troubleshooting on the server side<\/strong><\/p>\n\n\n\n<p>On the server side, check whether any of the following issues occurs:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The static IP Pool is exhausted.<\/li>\n\n\n\n<li>The DHCP server for the RRAS is not available or its scope is exhausted.<\/li>\n\n\n\n<li>The static IP address that&#8217;s configured in the Active Directory user properties can&#8217;t be assigned.<\/li>\n<\/ul>\n\n\n\n<p><strong>Get network adapter binding on the client<\/strong><\/p>\n\n\n\n<p><strong>Error 720 : ERROR_PPP_NO_PROTOCOLS_CONFIGURED<\/strong>&nbsp;typically occurs if the&nbsp;<strong>WAN Miniport (IP)<\/strong>&nbsp;adapter is not bound correctly on your PC. This is true even though the&nbsp;<strong>WAN Miniport (IP)<\/strong>&nbsp;adapter might look healthy when you examine the&nbsp;<strong>Network adapters<\/strong>&nbsp;node in&nbsp;<strong>Device Manager<\/strong>.<\/p>\n\n\n\n<p>There are several scenarios that can cause this error. To troubleshoot the error, start by checking the linked driver of your&nbsp;<strong>WAN Miniport (IP)<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open an elevated Windows PowerShell window.<\/li>\n\n\n\n<li>Run the following command, and search for the\u00a0<strong>Name<\/strong>\u00a0value of the\u00a0<strong>WAN Miniport (IP)<\/strong>\u00a0interface.<\/li>\n<\/ol>\n\n\n\n<p>PowerShellCopy<\/p>\n\n\n\n<p>Get-NetAdapter -IncludeHidden | Where-Object {$_.InterfaceDescription -eq &#8222;WAN Miniport (IP)&#8220;}<\/p>\n\n\n\n<p>For example, the name can be&nbsp;<strong>Local Area Connection* 6<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Run the following command by using the\u00a0<strong>Name<\/strong>\u00a0value that you verified in step 2.<\/li>\n<\/ul>\n\n\n\n<p>PowerShellCopy<\/p>\n\n\n\n<p>Get-NetAdapterBinding -Name &#8222;&lt;interface_name&gt;&#8220; -IncludeHidden -AllBindings<\/p>\n\n\n\n<p>Based on the output, choose the appropriate troubleshooting scenario from the following options, and follow the provided steps.<\/p>\n\n\n\n<p><strong>Scenario 1: Remote Access IP ARP Driver is disabled<\/strong><\/p>\n\n\n\n<p>If you see that&nbsp;<strong>ms_wanarp<\/strong>&nbsp;is disabled (as shown in the following example output), re-enable it by running the provided command.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/ARP_Disable.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"122\" src=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/ARP_Disable.jpg\" alt=\"\" class=\"wp-image-515\" srcset=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/ARP_Disable.jpg 850w, https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/ARP_Disable-300x43.jpg 300w, https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/ARP_Disable-768x110.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/a><\/figure>\n\n\n\n<p>Run this command:<\/p>\n\n\n\n<p>PowerShellCopy<\/p>\n\n\n\n<p>Enable-NetAdapterBinding -Name &#8222;&lt;interface_name&gt;&#8220; -IncludeHidden -AllBindings -ComponentID ms_wanarp<\/p>\n\n\n\n<p><strong>Scenario 2: A third-party filter driver is bound<\/strong><\/p>\n\n\n\n<p>If you see that a third-party filter driver is bound (as shown in the following example output), disable it by running the provided command.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/driver_probs.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"848\" height=\"135\" src=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/driver_probs.jpg\" alt=\"\" class=\"wp-image-516\" srcset=\"https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/driver_probs.jpg 848w, https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/driver_probs-300x48.jpg 300w, https:\/\/www.morong.info\/wp-content\/uploads\/2024\/08\/driver_probs-768x122.jpg 768w\" sizes=\"auto, (max-width: 848px) 100vw, 848px\" \/><\/a><\/figure>\n\n\n\n<p>Run this command:<\/p>\n\n\n\n<p>PowerShellCopy<\/p>\n\n\n\n<p>Disable-NetAdapterBinding -Name &#8222;&lt;interface_name&gt;&#8220; -IncludeHidden -AllBindings -ComponentID &lt;some_filter&gt;<\/p>\n\n\n\n<p><strong>Scenario 3: Reinstall WAN Miniport (IP) interface drivers<\/strong><\/p>\n\n\n\n<p>If the previous scenarios don&#8217;t apply, or if the steps don&#8217;t fix the error, reinstall the&nbsp;<strong>WAN Miniport (IP)<\/strong>&nbsp;interface driver:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open\u00a0<strong>Device Manager<\/strong>.<\/li>\n\n\n\n<li>Right-click all the network adapters whose name starts as &#8222;WAN Miniport,&#8220; and then select\u00a0<strong>Uninstall device<\/strong>. Here are some adapters that you may observe:<ol><li>WAN Miniport (IP)<\/li><\/ol><ol><li>WAN Miniport (IPv6)<\/li><\/ol><ol><li>WAN Miniport (GRE)<\/li><\/ol><ol><li>WAN Miniport (L2TP)<\/li><\/ol><ol><li>WAN Miniport (Network Monitor)<\/li><\/ol><ol><li>WAN Miniport (PPPOE)<\/li><\/ol><ol><li>WAN Miniport (PPTP)<\/li><\/ol>\n<ol class=\"wp-block-list\">\n<li>WAN Miniport (SSTP)<\/li>\n<\/ol>\n<\/li>\n\n\n\n<li>On the Device Manager menu bar, select\u00a0<strong>Action<\/strong>\u00a0>\u00a0<strong>Scan for hardware changes<\/strong>. This will automatically reinstall your WAN Miniport devices.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>&#8222;Error 720: Can&#8217;t connect to a VPN Connection&#8220; when you try to establish a VPN connection This article discusses how to troubleshoot error 720 that occurs when you try to establish a VPN connection. Symptoms When you try to establish &hellip; <a href=\"https:\/\/www.morong.info\/?p=513\">Cel\u00fd p\u0159\u00edsp\u011bvek <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[17,16],"class_list":["post-513","post","type-post","status-publish","format-standard","hentry","category-administrace","tag-error","tag-vpn"],"_links":{"self":[{"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/posts\/513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.morong.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=513"}],"version-history":[{"count":1,"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/posts\/513\/revisions"}],"predecessor-version":[{"id":517,"href":"https:\/\/www.morong.info\/index.php?rest_route=\/wp\/v2\/posts\/513\/revisions\/517"}],"wp:attachment":[{"href":"https:\/\/www.morong.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.morong.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.morong.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}