So, I am trying to connect to an unsecured network using my RPi and D-Link Wireless N Nano USB Adapter (DWA-131, Realtek RTL8192SU). Normally, when you sign onto the network, the internet browser redirects you to a webpage where you register your computer. Right now, I'm having issues having the network show up on my RPi.
So far, I have installed "firmware-realtek", and the dongle appears when I type in "lsmod", so I think I have all the drivers/firmware I need to run it. I am having problems creating my /etc/network/interfaces and /etc/wpa_supplicant/wpa_supplicant.conf files. I know that the internet is unsecured (doesn't use WPA), but I cannot figure out what these files should say to make the dongle and RPi connect to the network. (Most documentation shows you how to set up the WPA network, not an unsecured one.) Any help?