To activate the SSL-VPN options for a device
In the Settings section, click the SSL-VPN slider to activate SSL-VPN support.
Enter the values for the options for SSL-VPN connection, including the VPN Type, Server Address, User Name, Password, and Domain.
The maximum characters that can be entered for the above fields Server Address= 255, User Name=63, Password=63, and Domain=63
In the Certificate section, from the Client Certificate drop-down list, select the certificate you want used for the policy.
The CT VPN supports the certificate option where as NX VPN does not.