4 ms·

captive.apple.com does the same trick with a smaller payload.

• benatkin 3y ago
  Where can I go that has a bigger payload? When I've successfully opened a site on an unfamiliar WiFi network I'd like to know up front if I'm gonna have trouble loading stuff.
  • judge2020 3y ago
    captive.apple.com is just for captive portals - technically networks can (and do) spoof it, but it's just a connectivity check. Past that you can do any test you want over https.
    • benatkin 3y ago
      I'd rather have both in one :) neverssl strikes a pretty good balance