Log in to the Mist Admin Control Panel and on the left click Network > WLANs. Click Add WLAN at the top right and configure as per below:

SSID: Guest WiFi (or whatever you wish)

WLAN Status: Enabled

Security: Open Access

Guest Portal: Forward to an external portal

Portal URL: *insert access_url here*

Allowed Hostnames: *insert access_domain here*, cloudfront.net, venuewifi.com, openweathermap.org

If you wish to support social network logins, you also need to add the domains below for each network you plan to support

Click Save at the top right.

Next, go back in to the WLAN you just created and locate the API Secret key. This needs to be set in your WiFi portal under the Venue settings - "Mist API secret" box.