Show web UI with nodogsplash captive portal when connecting to hotspot

[zytegalaxy]

We need to run captive portal to automatically show web UI after connecting to the hotspot. If we don't do this, the user must turn off mobile data on their phone and enter URL of the web UI (ubo-xx.local:4321) manually in the browser which creates a bad experiences.

The captive portal would resolve the following domains to point to gateway endpoint serving the web UI:

• Apple devices: captive.apple.com
• Android devices: connectivitycheck.gstatic.com
• Windows: www.msftncsi.com

I tested running by following the steps in the following document:

https://hackernoon.com/how-to-create-a-custom-captive-portal-for-home-wifi-with-raspberry-pi-and-ai

We need to update /etc/dnsmasq.conf to add this line address=/#/192.168.4.1:

(env) ubo@ubo-3w:/opt/ubo/hotspot $ cat /etc/dnsmasq.conf
interface=wlan0
dhcp-range=192.168.4.2,192.168.4.20,255.255.255.0,24h
address=/#/192.168.4.1