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That's USB tethering. Which I can't do. Since I only have 1 computer and most of my connections are neighbors that I know. Which I don't want my neighbors to hijack my main wifi.you got to check this link I found it helpful to use my computers internet on my tab when I had no Wifi modem(root required)
That seems to complex. And the router I had is broken. Pretty much why I got a new one. It's a new one my ISP gave me so. Unless I get a router that supports making 2 routers. That's out of the question.You may of course be able to connect your old router to your new router and do it that way.
There are a couple of ways of doing it. I set my cable company supplies router into modem mode... and the plug my own ddwrt router into that. My own router provides the wifi networks.. wireless.. vpn settings etc.. and just uses the newer one as a pipe out onto the Internet
Alright, I'll get a new router. Not sure what will happen with the current one. Or if they'll even return it. Or accept a new one.Does your new router have an ethernet port in addition to wifi?
If so, you can pick up a really cheap router and try what @psionandy suggests.
ISP -> their router -> ethernet -> cheap router with wifi
They're not free, I'll grant you that, but they're not super expensive either (chose this sample at random for you) -
http://www.amazon.com/ZyXEL-Wireless-Pocket-Ethernet-MWR102/dp/B005WKIKA0
And I've seen them for less.
Not sure if it's in your budget but that's probably pretty much what you want.
Plus not a lot of setup hassle just for a guest network.