Once the remote server has been removed, the user is able to log FortiClient VPN successfully. Considering it is an expected behavior for 2FA email authentication, configure user only under member and keep remote server under remote group option without selecting any server.

Why do I see the error "Unable to establish VPN connection The VPN server may be unreachable. (-14)" during a FortiClient logon attempt? KB FAQ: A Duo Security Knowledge Base Article. Jul 10, 2020 unable to establish the VPN connection. The VPN server may The VPN server may be unreachable. Question. Close. 4. Posted by 3 months ago. unable to establish the VPN connection. The VPN server may be unreachable. Question. So, as with everyone, we've had to ramp up our VPN access for more WFH users. Our FortiGate 80E has been humming along for years now with a handful of remote users connecting via VPN

Jan 13, 2016

How to Install VPN on Windows Server 2016 - Thomas Maurer Oct 21, 2016 Some clients on a VPN network are not reachable - Server Fault

This indicates that the Access Server web interface’s XML-RPC interface is unreachable. The OpenVPN Connect Client uses this interface to obtain the necessary certificates and configuration to start the OpenVPN connection when you are using a server-locked profile.

[SOLVED] Unable to connect to the VPN Client service Mar 09, 2016 VPN Troubleshooting Guide – Fix VPN Connection Problems