Navigate to configure > network policies and select the guest network.
Set the security type to open
Enable captive web portal and choose 'User Auth on Captive Web Portal'
Set the authentication type to 'redirect to external URL'.
Add a new captive portal profile and copy the following details:
Name: Stampede
Login URL: https://nearly.online/*serial*
Password Encryption: UAM Basic
Authentication Method: PAP
Success page and failure page off
Walled Garden:
nearly.online
52.208.193.150
appleid.apple.com
appleid.cdn-apple.com
facebook.com
facebook.net
fbcdn.net
akamaihd.net
connect.facebook.net
akamai.net
Add a default RADIUS server group and copy the following:
Name: Stampede
IP/Host name: 52.211.166.55
Authentication: enabled with port 1812
Accounting: enabled with port 1813
Shared Secret: bxsecret
All other settings can be left as preferred. Save this and the selected SSID will begin redirecting to your Stampede login screen.