How to distribute the Internet from a netbook to a router?

Question

linux

Hello!
There is a Dlink DIR620 under the kinetics, and an unnecessary netbook. There is also a microdistrict without wired internet and a bunch of 3G modems. To download torrents, you have to use one modem (the maximum reception speed is higher, but often goes into reboot for its own reasons), there is another modem - stable, not capricious, but the maximum speed is only 4 megabits, I use it for games.
And then there is a 3G antenna, which will soon arrive from China, and the modem for which it goes has a high reception speed and is quite stable. But the kineticist does not recognize it, but Linux on board the netbook recognizes it.
The question is: how can I send 3G connections on Linux immediately to the local network, where this connection will meet the router with open arms and send it via Wi-Fi to the laptop?

Answer 1

Connect the laptop to the WAN port of the router with a wire, then share the Internet (there are a lot of instructions on the network how to do this) on the laptop, after that you can use the Internet from devices connected to the router.
When everything works with one modem, you can try to configure the laptop to work with two modems. Instructions on how to set up two Internet connections can also be found online.