You should be able to set the box with the modem to route everything 
through it (should be happening anyway), and set it as the default router 
for all the other machines, I think.


On Wed, 17 Dec 2014, Max Shinn wrote:

> I currently get internet access through a USB modem.  I also have a
> wifi network, but it is not connected to the internet; it only serves
> to provide wireless access to my ethernet printer.  I have multiple
> computers that presently share this USB modem (and by "share" I mean
> unplugging it from one and plugging it into another).
>
> So I was wondering if there was any way to use one of my computers as
> an internet source for my wifi router.  In other words, I want to be
> able to plug the USB modem into one computer, and then (wirelessly or
> via a cable) connect that computer to the router, allowing other
> computers connected to this router to use the USB internet connection. I
> know next to nothing about networking, and was wondering what the best
> way to accomplish this would be.
>
> Also, if it is relevant, network-manager is not compatible with my
> modem, so I'm using wvdial to connect.  After dialing up with wvdial, I
> run "ip route change to default dev ppp0 via 12.34.56.78" when also
> connected to wifi to circumvent network-manager, which expects my
> wireless connection to also give me internet access.
>
> Any help would be appreciated, even as far as relevant search terms...
> any info available online about how to accomplish this is hidden by
> info on how to make a computer's wireless card broadcast the signal,
> rather than linking it to a wireless router.
>
> Thanks,
>
> -Max
>