Troubleshooting Fortigate clientless VPN

When KB2585542 is present and you cannot open fortigate web interface, add a registry key

HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL
DWORDx32 SendExtraRecord
Value: 2

If you can't establish a VPN connection after loging in, turn off your firewall. Open CMD.EXE in elevated mode and type:

Netsh advfirewall set allprofiles state off

to turn the firewall off and

Netsh advfirewall set allprofiles state on

to turn the firewall on.