I have a D-link DI-514 router. Two PB´s are connected (wireless), and one Linux box is plugged into the router. For 2 years now, it´s been working fine. I just plugged it in and it worked. Lately, I´ve noticed that the connection sometimes slows down dramatically. After eliminating various reasons, I have decided the most likely cause is neighbors using our bandwidth. I haven´t done anything about security, and I can see my neighbors´ wireless systems on my screen, so I assume they´re seeing mine. I´ve now learned how to access the online configuration tools. After searching Mac rumors, I´ve learned I should disable SSID, and enable WEP. Unfortunately, my model doesn´t support WPA (I´ve already upgraded the firmware, from July 2004). Whenever I do these things, the computer just stops when I click "Apply". The window that says "the device is restarting" never changes, and when I finally click on "continue", my changes are gone, along with the wireless access. I´ve ended up restarting the router several times. In addition, I´d like to restrict the wireless access to the specific MAC numbers of our three computers, but I don´t know how to find them on each computer...???? I´ve played around and tried to follow the instructions I´ve found, but have managed to completely eliminate our wireless access each time. So now I need help before I dare to try again. Anyone have any ideas, or experience with this specific model? If I have to, I´ll get a newer, better, and most likely more expensive router. But it would be great to just improve security on what I have.