Picture of How to share a WI-FI connection

The easiest way to share a WI-FI connection is to have a network adapter for every singe computer you want to share the network with. But what is you only have 1 adapter, 1 connection, and 2 computers that you need to share the connection between?

You will need:

2 computers.
A wireless network adapter. (Preferably USB, but any will do)
An Ethernet cable (The same length as the distance between the 2 computers.)
Windows XP or better.
A wireless network.
And a general understanding of how the internet works.

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Step 1: Do everything beforehand

Picture of Do everything beforehand
My reason for needing a connection split between 2 computers is because I needed to move the router, and modem downstairs, where my family spends most of their time using the internet. So it would seem logical to move the router downstairs (to get better reception). However, I ran into a problem... The two computers in my room were connected to the internet using 2 Ethernet cords, and I only had 1 USB wireless adapter. To share the connection I would have to create a MAC Bridge between the Ethernet cable, and the WIFI adapter on the same computer, (while the other end of the Ethernet is connected to the other computer). So do everything you need to do before starting this, move the router, wires, and power supplies beforehand (and test that it works).

Step 2: Setup the hardware

Picture of Setup the hardware
First of all. Use a Ethernet cable to connect the 1st computer, with the second one. Then plug in your USB WIFI adapter to the computer closest to the wireless access point you are trying to reach, (or if you have already done that skip this step).
rumanaa7 months ago

hii...if one wifi is shared by different mobiles and laptop than does it access all the information which we are being accessed throgh mobile?

Crabcakes1 year ago
Like pastaking, my first reaction would be I would need crossover cables... but I tried TechyGeeky's steps to the letter and VOILA! It works san crossover cable! (It's been a few years since *I* went to networking school.... and everything is so much easier now!)
Crabcakes1 year ago
Thank you so much! Worked like a charm with two Windows 7 desktops! The PC with the USB adapter did say it was bridged, but the other did not get the message! A reboot of the cable modem and the router did the trick! No significant slowdown of internet either - of course they are not gamers! I have 3 kids in online school- the school sent the computers, printers, mouse, etc., everything I needed but none of the computers are WiFi ready and they omitted telling us that! (You would think an ONLINE school would send WiFi enabled or at least WiFi adapters!) I can not afford to go buy 3 USB WiFI adapters, nor have time to install WiFi cards on three PCs. I used your instructions with the one USB adapter I had - so now 2 can have WiFi. Third child will use old laptop till I can buy another. Thanks again!
pastaking3 years ago
For this to work, you'd need a crossover cable or something inbetween the two computers, as bad things will happen otherwise.
TechyGeeky (author)  pastaking3 years ago
I'm sorry but it already does work, and what do you mean by "crossover cable"?
A crossover cable is a CAT5 patch cable where the transmit and receive wires are wired differently, with the T signal at one end going the the R at the other, and pastaking is correct in saying that this is what is (traditionally) needed for computer to computer connections. HOWEVER, many newer NIC (Network Interface Cards, the part in the computer that the CAT5 wire plugs into) can auto-sense what type of connection it is ( Hub to computer vs computer to computer) and deal with it via internal magic. This is probably the case with TechyGeeky's setup.
Nice instructable.
pastaking kydlt3 years ago
Oh. Lucky, having new NICs! I have to live with ancient HP NICs.