Me and my friend would like to connect our computers into LAN. We live in the same neigbourhood, but we are apart about 200-300 meters. Is there any wireless equipment that can handle such distance?

There are repeaters that if set up properly could do the distance. If you have a clear line of sight you could also use directional antennae to cover that distance, possibly. Have you considered VPN?

i do not have clear line of sight, and what is VPN?

Virtual Private Networking (VPN) is a LAN that is tunneled across the Internet securely(sometimes). This is what google has to say about VPN.
http://www.google.com/search?hl=en&i...=Google+Search

ok, spare me the theoretical definition, what is it in practice?

Well, in practice it's "a LAN that is tunneled across the Internet securely(sometimes)."

It let's you create a "LAN" over the internet. So, you're friend(s) could be 200m-300m away, or 200-300 miles ... as long as you're on the internet and the software is configured, it's just like being on a LAN.

Pcghost's post is spot-on and should provide you with all the information you need.

That being said, VPN essentially provides a (generally) secure communications channel between a given system and a remote PC. For road warriors who travel with laptops but still need to connect to the main office, VPN is pretty much the way to go. FYI - really the only reason there is any hedging around the security aspect of VPN is simply because the bits have to travel over the Internet, which obviously cannot be considered "secure". For all practical purposes, it is secure, but Yes, there is the theoretical chance that data could be intercepted. -- J.W.

so, my friend has dial up connection, but I have a cable. We would like to share my cable connection with his computer (e.g, he also gets broadband connection), but as far as I understand VPN, that is not that, is it?

You are correct. VPN will be limited by the slowest connection involved. Wireless repeaters are your best bet for ICS, unless someone else can think of a better way.

which manufacturers are situable for linux (wirelless repeaters)?