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1answer
63 views

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 ...
2
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0answers
47 views

If I install a certificate for the purposes of logging into a Wifi connection, is it still safe?

There are some wifi networks (large universities for example) which use HTTPS to get to a login page, and in order to verify that they have not been spoofed, provide the certificate ahead of time ...
2
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1answer
139 views

HTTPS in captive portals and the Apple Captive Network Assistant

Suppose I connect to the Wi-Fi of a company I trust enough to give them my credit card number (say, my local airport). When I connect to their Wi-Fi network, my web browser gets redirected from any ...
7
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1answer
333 views

Distinguish between Wi-Fi Captive portal and MitM attack

Not sure whether this should be asked in Super User or here. How does Chrome distinguish between a Wi-Fi access point intercepting with a captive portal and a man-in-the-middle attack on HTTPS? Are ...
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2answers
129 views

Is there any reason that captive portal server can't block the ICMP echo request/reply packet

We can get connected to those public WiFi hotspot without the account but can access to no website but the login page. As I tested, all those login website would respond to my ping even I was an ...
2
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1answer
180 views

How are Captive Wifi Portals secured?

I'm looking for a captive portal solution that prevents other users from stealing the session key from other active users. (or prevents the cloning the authenticated user's MAC) Is there a reliable ...
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0answers
75 views

How should a captive portal handle SSL requests, that are expired, or not authenticated?

What is the best course of action for a user that uses HTTPS anywhere, or tries to access a secure URL (from an phone based App, or from a browser)? Ideally, I'd like to get the phone to "prompt" via ...
3
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1answer
380 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 ...
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2answers
3k 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 ...
3
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1answer
471 views

captive portal wikipedia article

Something on the wikipedia page regarding captive portals have confused me: http://en.wikipedia.org/wiki/Captive_portal When a client requests a website, DNS is queried by the browser. The ...
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1answer
572 views

Designing and managing a captive portal

I'd like to learn more about how a captive portal works, especially the management system regarding usage, security monitoring, billing, security architecture etc. Does anybody know any good ...
6
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1answer
9k views

Bypassing a captive portal with tor

I know that NSXTS and Iodine can be used to bypass a captive portal by taking advantage of permissive DNS firewall rules. What I have found recently is that simply by using Tor, I can also bypass a ...