Networking – How to Configure Switch Router and Two Computers with One Internet Connection

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I think this is quite a bit confusing for me. I have an internet connection that can only be accessed from Computer-A.
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But then,… I have one Switch WIFI Router TD-W8915ND, and another computer, called as Computer-B.

Now the computer-B is connected to the router via WIFI. And also the Computer-A also connected to the router via WIFI. Then…. The question is, how can I share my internet access, so anyone who connected to the router WIFI, can access the internet?

Rule 1: Do not plug-off the Internet LAN cable of Computer A. LAN Cable can only be used by Computer-A.

Best Answer

You need to ensure the following:

  1. You need to run NAT (Network address Translation) on Computer A on the WIFI interface - presumably you would use "connection sharing" in Windows.

  2. You would treat your WIFI router as an Access Point + Switch - you want to disable DHCP on it as Computer A would be doing the connection sharing. You would also want to ensure nothing is connected to the WAN port of the WIFI router, and that its LAN port is statically assigned in the address range associated with the WIFI interface on Computer A, but outside the DHCP range.

  3. Set up computer B (and other devices like it) as you regularly would if connecting to a Wireless Access Point.

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