![Error 720: Can't connect to a VPN Connection" when you try to establish a VPN connection - Windows Server | Microsoft Learn Error 720: Can't connect to a VPN Connection" when you try to establish a VPN connection - Windows Server | Microsoft Learn](https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/media/troubleshoot-error-720-when-establishing-a-vpn-connection/vpn-error-message.png)
Error 720: Can't connect to a VPN Connection" when you try to establish a VPN connection - Windows Server | Microsoft Learn
![l2tp - Windows server 2022 ports required for vpn connections have been blocked by the firewall - Server Fault l2tp - Windows server 2022 ports required for vpn connections have been blocked by the firewall - Server Fault](https://i.stack.imgur.com/DizWE.png)
l2tp - Windows server 2022 ports required for vpn connections have been blocked by the firewall - Server Fault
![rras - How can I configure IPSec on Windows 2012 R2 to use Pre Shared Key compatible with Android phones? - Server Fault rras - How can I configure IPSec on Windows 2012 R2 to use Pre Shared Key compatible with Android phones? - Server Fault](https://i.stack.imgur.com/nBDDa.png)
rras - How can I configure IPSec on Windows 2012 R2 to use Pre Shared Key compatible with Android phones? - Server Fault
![Set up an L2TP VPN Server on Windows Server 2012 - Configuring Windows Server 2012 R2 (VPN Server configuration) - IT Droplets Set up an L2TP VPN Server on Windows Server 2012 - Configuring Windows Server 2012 R2 (VPN Server configuration) - IT Droplets](http://www.itdroplets.com/wp-content/uploads/2016/09/add-feature-remote-access-management-tools-windows-server-2012-r2.png)