I posted this article on another site called Tech Livewire, and I will go into more depth on this matter. You may see an open signal of a Wifi point, be it a Hotel signal or any other signal. While most open signals let you connect after you click “I Agree”, some Wifi signals are locked even though you can get in, you will still be prompted for some kind of authentication.
Let me tell you about. TOR wasn’t designed for bypassing captive portals but it was rather designed to keep people anonymous online. It uses onion layers and other technology that masks a user and makes them anonymous. TOR bypassing Wifi captive portals upon connecting to TOR nodes is a side effect of TOR making its own DNS subnet masks or something. I am no networking guru but something about how it connects to the internet causes captive portals not to know about it. Before you can even bypass the captive portal you need to already have downloaded TOR previously. TOR is easy to use, Just run it and it connects to the internet anonymously. You can disable scripts to further anonymize yourself.
Tor can bypass some captive portals and it has an android version too (don’t know about iOS), and it all varies on the type of captive portal you are connecting to. The legality of you bypassing a captive portal is a different story. I think it may be illegal to bypass a captive portal and connect to a Wifi network, but I am no lawyer. Tor can also give you free Comcasts internet by bypassing the Comcast captive portal after your service is suspended. In other words, Tor gives you extra free months of internet before Comcast totally pulls the plug on you. I haven’t tried TOR on the Xfinity captive portal, but I think Comcast patched that hole up by now. I don’t know if I am the only one that discovered that hole. CenturyLink isn’t vulnerable to that hole that allowed me to get free internet after they cut off my service.
Speaking of Comcast internet for free, did you know that the Xfinity wifi signals that are open allow you to register for free to get 1 hour of free internet? Wish CenturyLink did this for people. Comcast even has a plan for people who don’t make a lot of money and who have kids that get food assistance at school. It is called the $10 plan and there is a website you can apply for that plan. It is called Internet Essentials and it is for low income families. http://www.internetessentials.com/
Another way you can try and bypass Wifi captive portals is to use ?.jpg at the end of the url you want to go to. For example www.google.com/?.jpg This has been proven to work on some Wifi networks like Airport Wifi. I just hate it when a place like an Airport wants to charge $7 for 15 minutes of Wifi usage to customers that already paid for expensive plane tickets.
If you wanna really crack a secured Wifi network–it is time to bring in the heavy artillery. You can study and use Kali Linux or Backtrack Linux WP2 WPA Wifi hacking. You would be surprised that a lot of the world is still hackable. Just keep in mind every state has their own laws when it comes to hacking. Below is a video of a guy using Backtrack to do this, you can find tons of videos and tutorials on using Backtrack, but it is such a headache to learn that you might as well just buy your own internet