Hello all. Currently I am trying to fix the problem related in this topic : http://windows7forums.com/windows-7-networking/47339-turning-off-nat-troubles.html I think I have found out the problem and that can be the mis-configuration and I dont know which type is the best and the most appropriate. Since my modem is a cable modem and cant be configured, I must configure the settings of my router. And when Im going thro the Setup Wizard in my router, I may need to change some things to hopefully fix the problem without messing with the connection and sharing itself. Here are a couple of pictures showing the most...uh..., let's say the pages that might make a difference in changing. Also here's a scheme of my actual connection and it's device's and stuff. If you see the picture you'll see what I mean. Thanks for reading and I would appreciate your help.