Turn your laptop in to a wi-fi hot spot



There  are numerous articles on internet which discuss the same topic , but curiously most of them are discussing on the third party application to set up your own wi-fi hot spot.  This post is an attempt to discuss the in built feature of windows 7 to convert your wired internet or 3g connection to a shared access point for your friends or business colleges .


Background :

Situation  # 1:    There are numerous occasions in which you need to through up your own wi-fi hot spot. May be your ADSL  or cable  internet connection does not come with a wi-fi enabled router but use  a modem that directly attaches to your desktop, but your tablet or smart phone only support a wi-fi access than the typical Ethernet  connection.


internet connection software is there in Microsoft products from windows 98 second edition onward . Mostly we use the ICS to share your internet over a wired network. But the same can be used to share your wired connection to a wireless network , converting your laptop or desktop to a wireless access point.

Situation # 2:  

 You have a 3G connection available as a USB dongle which you wish to share with your friends. Normally your high end routers have option to directly plug the 3G dongle to it, but normally it is a costly solution and these routers does not support all these dongles and anyway  our discussion here is to  avoid these routers altogether and use our laptop for the same function.

Current Scenario 

To experiment with setting up the wi-fi hotspot with build in feature of windows , we have done a basic setup with two wi-fi enabled  laptops and a idea net setter 3G dongle , So we are explaining the situation #2 . Instead of this 3G dongle you can also use the wired broadband connection as discussed in situation # 1

The sony vio laptop  installed with windows 7 ultimate is used to create a wi-fi hot spot.  An idea netsetter 3 g is installed on the machine and will show up as a connection in the    Control Panel\Network and Internet\Network Connections    refer to the above  image for the configuration details . The wired connection on the exhibit is disconnected . If a wired broadband is used  as discussed on the Situation  # 1: , the Wired connection will be enabled for the procedure .

Now select the properties of the 3 G connection  ( or the LAN if you are using a wired broadband ) 

Select  the sharing option and enable Inter connection sharing by checking  the  box on ” allow other network users to connect ..” option . This will enable the DHCP and NAT function on the connection we selected and the system will be ready to share the internet to the connection we are going to specify.

Now select the wireless connection as the preferred home networking connection . This will change the IP  address of the wireless adapter to   which is the range used for ICS  in windows 7 ( For the case of a ICS in  windows XP machine , the IP was .

Now we have to convert our wireless connection to ad-hoc so that the the connection will be ready for receiving the users over the network .

go to network and sharing center and select the option to set up a new connection or network 

Now select the option to setup an ad-hoc network

Select the SSID , the preferred encryption method and the encryption key for the new wireless connection and finish the procedure

Now  your connection will be visible on the system tray area .

On the client side , we are using a XP machine . It does not matter which OS you are using on the client side .  select the wireless network named Desktopreality which is now showing on the wireless configuration window  as shown below , type in the security code you have given and the WiFi adapter will connect to the network on your windows 7 machine and ip address for the adapter will be supplied by the DHCP service of the ICS on windows 7 and you will get as the IP .

and that’s it. Finally you have a wi-fi hot spot set up with out using any costly router hardware or any kind of third party software . The final result is  shown below .

Posted in: GENERAL TOPICS, Networking, TIPS & TRICKS, Uncategorized

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