VPN Server may be unreachable (-14) in Windows 10 (Forticlient SSL VPN)

[abhimanyu]

I had tried to setup VPN connection. Using the latest version client and firewall. In windows During the login time it shows

"VPN Server may be unreachable (-14) " . Status shows 80% complete. BUT it works in ANDROID..!!! Anyone resolved this ?

[zaphod]

Try to disable TLS 1.0 / 1.1 in internet options

[brunogabrielli]

Hello abhimanyu.

Did you solve the problem?

[bitbauer]

I'm experiencing the exact same problem/error message? I then tried to change the Internet Explorer settings and disabled the TLS 1.1 and TLS 1.2. But that did not solve the problem. Any further suggestions?

[zaphod]

@bitbauer

did you use the latest forticlient? (6.2.x)

[bitbauer]

Yes, I'm using version 6.2.2.087. I also tried to reinstall the FortiClient without luck.

I had installed another VPN client(ShrewSoft VPN Client), but uninstalled it and then reinstalled the FortiClient. Also no change. Perhaps that installation left something behind on my Windows 10 workstation?

I should also mention that I have internet access via TV cable, which assigns a IPv6 address to my router. Perhaps that causes a problem, too?

[bitbauer]

Tried it on a different computer, same result :(

Here is what was logged:

14.11.2019 19:54:44 Debug VPN FortiSslvpn: SSL VPN Tunnel is Disconnected ********* 14.11.2019 19:54:44 Debug VPN FortiSslvpn: Client is exited (1) 14.11.2019 19:54:44 Debug VPN FortiSslvpn: Init:ConnectNamedPipe(): Wait(hEventOverLapped) OK. 14.11.2019 19:54:44 Debug VPN FortiSslvpn: before ConnectNamedPipe 14.11.2019 19:54:44 Debug VPN FortiSslvpn: Init:ConnectNamedPipe(): rc=0, err=997 14.11.2019 19:54:44 Debug VPN FortiSslvpn: _ReceiveMessage: (000003E0)

My colleague is able to connect with his user account on another computer though... 

[bitbauer]

UPDATE: Found a solution...just installed an older Version of the FortiClient (6.0.2.0128) and connection could be successfully established!

[zaphod]

strange. but good you got it running now.

[Waldeyer]

Worked for me using

Use SSL 3.0

Use TLS 1.3 (experimental)

Fine.