[solved] (how) can I use my laptop as a router for other computers?

First of all, I have to admit that I do not know too much about networking. Just enough to make the simple things work properly.
I have a laptop, which accesses the internet by wireless lan. The router is in my downstairs office. So far so, good, I have a media computer (both running Arch) in my room upstairs, intended to watch dvds or internet tv on the tv screen.
Connecting this computer to the downstairs-router by cable is not possible. Now I wondered, if I really needed to buy a wlan-card (any suggestions which one works well with linux?) or if there might be an (easy) solution using my laptop as (sort of) a router, connecting them by cable and establishing a lan connection between both of them.
Is it possible, to get internet access on the media computer that way, without to much effort? And what do I need to do to get it working?
Last edited by saciel (2008-07-07 01:13:05)

Well, I tried to set it up to day, realizing that it is probably not as easy as it appears to be.
I did everything according to the wiki but from the laptop I can access either the internet OR the other computer, but not both at the same time. It seems to depend on which network profile I activate first.
If I first activate and configure the ethernet card, I can acces the other computer (I tried ping and ssh), but if I then start the wlan profile I cannot access the internet on the laptop. If I start the internet profile first and then configure the ethernet card, I cannot ping the media pc anymore.
I'm not sure what could be wrong, as I just did everything according to the wiki entry. Ideas?

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[solved] (how) can I use my laptop as a router for other computers?

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