Router or Switch

[yesgrey]

If there is no DHCP server in your network than you will need one.

Thanks for your reply. That might be the reason... My internet service comes from an ethernet port at the entrance of my apartment, which is a broadband connection, like a big LAN in the entire building, so, I don't have any router. They only supply us one in case we also want phone and TV, but I don't need any of that.

I will try to install the DHCP server software as you suggested.