I am trying to set up a captive portal for mobile devices. I setted up dnmasq to resolve all DNS queries to hotspot IP. I configured Apache as:
RedirectMatch 302 /generate_204 http://jp.config/captive/login.html
RewriteEngine on
RewriteCond %{REQUEST_URI} !^/captive/ [NC]
RewriteRule ^(.*)$ http://jp.config/captive/login.html [L]
It works for one of my phones (Xiaomi), when I connect to hotspot a browser window opens automatically. I have another phone (Siemens J5) which doesn't work. When I connect to hotspot it says I may have no Internet access but no browser opens. I can see http://jp.config/captive/login.html gets called using tcpdump from server side but it never gets shown. That same Samsung mobile works ok using other captive portals.
Any additional config needed? Any ideas?
EDIT
Looking apache logs again it seems /generate_204 does not generate a captive portal load, a second / call seems to produce a captive portal query. ???
"GET /generate_204 HTTP/1.1" 302 582 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J530F Build/NRD90M)"
"GET / HTTP/1.1" 302 575 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J530F Build/NRD90M)"
"GET /captive/login.html HTTP/1.1" 200 1448 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J530F Build/NRD90M)"
"GET / HTTP/1.1" 302 541 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J530F Build/NRD90M)"
"GET /generate_204 HTTP/1.1" 302 582 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J530F Build/NRD90M)"
Regards