Cannot connect to SSL VPN, FortiGate 5.4 (Windows 7 and XP) Part2

[edgar1]

Description
This article addresses the error message "Cannot connect to VPN. The VPN server could be unavailable." which may be seen when Windows 7 or Windows XP tries to connect to SSL VPN when using v5.4.

Scope
FortiGate All Models

FortiOS as of v5.4

Solution
In addition to enabling SSLv3 and/or TLSv1.0, it may also be needed to allow any cipher strength (high and medium):

conf vpn ssl setting

  set sslv3 enable     // might be needed

  set tlsv1-0 enable   // might be needed
  conf authentication-rule
  edit <rule_id>
    set cipher any
  next
  end
end

Cipher strength:

set cipher ?

any       Any cipher strength.

high      High cipher strength (>= 168 bits).

medium    Medium cipher strength (>= 128 bits).

This may have to be done on every authentication rule that allows Windows 7 and XP access through VPN SSL.