The virtual portal tool built on Eleven Standard Gateway can be used to test the EOS captive portal. The URL can be shared externally for verification by non Admin Users on any web browser.
To use the ESG emulator
select an environment
In EoS ADMIN, find the service area that you want to test with and add a new device of the type Eleven Standard. Populate the attributes from https://esg.wifiportal.io/
Use the Portal test URL to test the portal!
Note these ESG attributes are generated randomly on each page load but you can get the Portal URL at a later date by finding it on the Eleven Standard Device Record