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On one day, I experienced in a situation that only me who have internet connection through HSDPA modem while my other friends doesn't. They asking me to share that connection so they also can connect to internet, but how? I wondering...
None of us have wired to connected each other, so the only choice is using my laptop wifi to broadcast to them, and after trying everything finally its broadcasted and they can connect to me and using that wifi that I shared to browse the world wide web.

Spesify of my laptop are:

Forsa Montevena 3687
Description :
INTEL CORE 2 DUO T7300 2.0 GHZ ( 4MB/L2 CACHE/800 FSB)
INTEL 45 PM Chipset
14.1" WXGA GLARE TFT
2 GB DDR2
250 GB SATA
LAN Gigabit, HDMI, Webcam 2.0 MP
WIFI Intel 5100 ABGN
Nvidia GeForce 9300M GS 512 Gb
DVD-RW SUPERMULTI

use this command :

" sudo apt-get install firestarter "































2. Go to Networks Manager and click on Create New Wireless Network :
























3. Enter a name for new wireless network :


















For example I naming my network as iceman, and I don't use security so I choose none for it, than click on create to continue.
After you click on create you will have a notification that your new network is established, but it can not shared through wifi right away and you have to configure your VPN.

























4. Go to Network Manager and click on VPN Connections >> Configure VPN...























5. Go to Wireless, click on the name you just create and edit it (click on edit) :






















It will showed like this below image, you also can make it connect automatically by clicking on it or not its up to you :































6. Change the mode from Ad-hoc to infrastructure :































And this other setting you should match it :





























































Finally just click on apply....

7. Done... your laptop wifi broadcast will exposed to other wifi nearby, congratulation!

Now when you successfully shared through your laptop wifi this time, you may put some security on next times, so your personal 3.5 G will not be raped and only people who have authorizations can enjoy your HSDPA bandwidth ^_^.

And don't forget to connect your HSDPA modem!

I will glad to answer your questions about how to share laptop wifi if you have a problems to do so.