I own a Dlink Dir 615 router.
Right now, its running fine, and I am able to access it wirelessly throughout the house. We even have a printer as a shared printer. My problem right now is that its not secured, and I want to secure it as much as possible, so that a password is needed. I want security type to be WPA2 PSK. I also want to make sure that when I do this, that I do not disrupt the shared printer situation, as the last time I tried doing this, I noticed that I no longer could print and I had to reset the router. Lastly, is there a way for me to control the range of my signal, so that I can make it long enough for my needs but not anymore than that?