Questions tagged [captive-portal]

A captive portal is a web page served to users of a network, often asking for credentials, before they can use the internet.

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Public AP: How to reduce vulnerability window between Captive Portal and starting VPN?

I always use a VPN on my Mac when I access over public APs (such as coffee shop free WiFi) How much should I worry about the window of time where I am in the captive portal (the agreement screen) and ...
4
votes
1answer
735 views

Can a captive portal be secured [closed]

I am interested in using a captive portal on a public network. After reading the wikipedia article and several questions here on sec.SE, I don't understand how I can secure it, or even, if I can ...
3
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3answers
2k views

Enterprise HTTPS redirection without certificate error

I have a captive portal setup for my organization that forces users to authentication prior to being allowed access to the network. Challenge is that when a user opens their browser and their homepage ...
5
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2answers
5k views

How is user authentication sent in a public wifi? Radius/802.1x/EAP etc

I visit the airport, I pull out my laptop and connect to a network (no password needed). I open up my browser and i am presented with a screen saying I need to pay to use the network. If I pay, I ...
1
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2answers
141 views

Why do evil twin attacks against WiFi use a captive portal?

I was recently the victim of an evil twin attack on my WiFi network, probably by the new upstairs neighbors. It prompted me, with a captive portal, saying there had been an update and I needed to ...