What is captive.apple.com/hotspot-detect.html

I returned from a trip to find a window open on my Apple computer. It says "http://captive.apple.com/hotspot-detect.html" at the bottom. In the center of the window is says "success". I've never seen this window before. What is it?

MacBook Pro, Mac OS X (10.6)

Posted on Mar 11, 2016 5:02 PM

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4 replies

Jul 10, 2016 9:02 AM in response to prothstein

I have suddenly begun to get these pop-ups on my 27 inch iMac, which doesn't move -- but I do have a Linksys Wi-Fi router which has a "Guest Network" requiring a guest to login.


The answer is -- it is an undocumented "feature" in OSX.

https://grpugh.wordpress.com/2014/10/29/an-undocumented-change-to-captive-networ k-assistant-settings-in-os-x-10-10-yosem…


"A captive portal is a network that forces an HTTP client to see a special web page (usually for authentication purposes) before using the Internet normally. A captive portal turns a Web browser into an authentication device. These are commonly used on wifi networks where authentication to the private network is done via a login browser page, rather than via the use of a WEP or WPA2 key, for example in some coffee shops and airports, and hotspot providers such as The Cloud and ATT-Wifi.

On Apple devices, if a captive portal is identified, a special application in /System/Library/CoreServices called Captive Network Assistant.app is opened. This is a very limited browser, separate to Safari, with no address bar or navigation buttons. . . "

See also: http://apple.stackexchange.com/questions/45418/how-to-automatically-login-to-cap tive-portals-on-os-x

And: https://www.reddit.com/r/applehelp/comments/3dc6jv/strange_popup_every_5_minutes _regarding_my_wifi/

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What is captive.apple.com/hotspot-detect.html

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