Hello josue,
You can do this by navigating to Advanced > Remote User Access and enable
Remote User Access. I would recommend using L2TP w/ IPsec but we do also support PPTP if this is the only connection type you can use. You will need a public IP address to connect to to take advantage of this method.
If you have the device setup in IC2 you can also use this to manage the wireless SSID settings. You can set this up from the Group Level. Hover over Wi-Fi AP and click on Group-wide SSID Settings. Make sure Wi-Fi Management is enabled and click on Add New SSID. Change the configuration as needed and click the Save Changes button. The SSID will be pushed down to any devices that you have selected that in the SSID Availability > Device Selection area.