Apple and Android devices connect to fixed URLs[1][2] to verify the connection. Some captive portals whitelist only those URLs, so you only see this behavior w

Apple and Android devices connect to fixed URLs[1][2] to verify the connection. Some captive portals whitelist only those URLs, so you only see this behavior when the captive portal creator wants it to happen. 1. http://www.apple.com/library/test/success.html http://www.apple.com/library/test/success.html 2. http://clients3.google.com/generate_204 http://clients3.google.com/generate_204