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This question already has an answer here:

To turn Raspberry Pi into a Wi-Fi router capable of serving internet to multiple clients:

  1. What hardware do I need?
  2. What software components one shall create to run it?

marked as duplicate by Ghanima, Patrick Cook, Jacobm001, mpromonet, Kachamenus Nov 15 '15 at 20:49

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  • You don't need OpenWRT; Raspbian has a hostapd package (the Jouni Malinen implementation). You just need to find a decent adapter with this capability and a known working linux driver; perhaps a +/2 model will be better because of the USB power draw. – goldilocks Nov 9 '15 at 16:54
  • I've used an A+ with Edimax nano adapters as a router with no problems. Keep in mind, you're not going to get very good performance with the RPi as a wi-fi to wi-fi router compared to dedicated hardware. It works reasonably well for wired-wifi routing. – bobstro Nov 9 '15 at 18:31
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It is possible. However, the answer to "is it practical?" would depend on your definition of multiple.

You need to have a Wi-Fi USB card which has allows/provides AP mode. Once you have it attached then you can install and configure hostapd and I am certain that someone must have documented the configuration process online in detail. This may involve iptables modification/entries as well.

Feel free to comment in case of query/doubt. I have worked on a project (which was for traffic monitoring) in which my client had the setup done and I would send him the cross-compiled binaries. Therefore, I am certain that this can be done but again, the practicality of the solution would depend on many factors.

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