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THE NEED
I am having broadband connection via cable(without any modem) in my laptop. I was about to purchase a wifi modem so as to connect my mobile phone and laptop both to it. But while browsing Web I came to know about reverse tethering i.e. to make your laptop a wifi modem so that you can connect other wifi devices directly to it. Thus eliminating the need to buy coastly wireless modems any more. I have tried and tested it succesfully. Give it a try if you are in same condition as I was.
INTRODUCTION
All Windows 7 machines can become a wifi access-point, routing the connections over Ethernet or even over a client station connection on the same wifi adapter. Instructions for doing this are below.
HOW IT WORKS
Windows 7 can create "virtual" wifi adapters based on the real adapters, with a unique MAC address and everything. This is similar to VAPs on Linux, which allows you to create one virtual adapter for logging onto an access-point, and another for running a soft-ap. The difference with Windows 7 is that it creates only a single virtual adapter for "hosted" mode -- no matter how many actual adapters you have in the system. It's called "Microsoft Virtual WiFi Miniport Adapter", with the same MAC address decremented by one.Making it work is simply a matter of (1) configuring the SSID and WPA password, (2) configuring Internet Connection Sharing to bridge it with the network, and (3) turning it on.
WHY IT WORKS
Microsoft wants you to be able to transfer music/video from your computer to your wifi printer or windows phone easily. This makes it easier.
INSTRUCTIONS
STEP 0: Open a command-prompt with administrator privileges.
Click on Start menu, All Programs, Accessories, right-click on Command Prompt, select "Run as administrator"). Type in:
STEP 1: Configure the "hosted" interface:
netsh wlan set hostednetwork mode=allow ssid=Test key=letmein9
This example creates an access-point with an SSID of "Test", with a WPA password of "letmein9".
STEP 2: Configure Internet Connection Sharing (ICS)
Open up the networking control panel. Select the interface that currently has Internet connection (like your Ethernet or normal wifi), enable "Sharing", and then select the special "hosted" interface.
STEP 3: Start it
netsh wlan start hostednetwork
On your other devices (say, Android phone), connect to "Test" and give the WPA password of "letmein9".
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