Firewall (port filter rules, etc.) Disable the software firewall and try to connect again with the VPN …

Unable to connect Firefox can’t establish a connection to the server at support.mozilla.org. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer’s network connection. FortiGate Unable to establish the VPN connection. The VPN Dec 12, 2013 Common FortiClient SSL VPN Errors - Informe de Libros Jan 13, 2012 Forticlient vpn and Win 10 - Networking - Spiceworks

Dec 18, 2015

Unable to establish VPN Connection with Citrix SSO app Unable to establish VPN Connection with Citrix SSO app [Certificate based Auth] for Android Enterprise. Alias shows as optional, however, it is needed for Certificate based Authentication, without which it will fail to establish VPN. We can capture the Certificate Alias from one of the following methods: not able to connect to VPN server - TechRepublic

Unable to establish the VPN connection - Techyv.com

The VPN server may be unreachable. (-5)" is obtained in FortiClient trying to connect to the SSL VPN and it is stuck at 40% after upgrading to 5.4.x from 5.2. or earlier. Solution Unable to establish the VPN connection . Asked By Donal Bambie 0 points N/A Posted on - 09/20/2012. Hi All, One must have a frames-capable browser to use Fortinet KB. Get one here: http://mozilla.org Forticlient Unable To Establish The Vpn Connection 10%; Unable To Establish The Vpn Connection. The Vpn Server May Be Unreachable (-4006) And 1.2 in the very monday morning, Thank you.Delete UnknownOctober 5, 2016 at 8:56 PMTHANK YOU SO MUCH