SSLVPN Login Page will not display

Description
If you are trying to configure SSLVPN on the FortiGate and the login page displays for WAN1's public IP address but not for WAN2's

Solution
Step 1
Check VPN > SSL > Settings > Listen on Interface(s)

Step 2
Verify authentication rule has appropriate interfaces configured:
conf vpn ssl settings
config authentication-rule
edit 1
set source-interface wan1 wan2
set source-address all
end
end

For a sample configuration of SSL VPN, see:
http://cookbook.fortinet.com/ssl-vpn-for-remote-users/