I recently installed a set of security cameras in my home, and they all connect to a DVR that is accessible via my ethernet network. I've also managed to make the cameras visible on my SmartPhone so I can check things at home when I'm away. However, I'm a bit leery of the security of the system as a whole. I have a Linksys WRT-54G router, and I'm using its port forwarding capabilities to access the DVR and cameras from my PDA, but it also allows anyone who knows my IP address to get into the system. Yes--the DVR is password protected, but if someone had enough time and inclination they might be able to crack into it. Not a big deal for the most part since the cameras are primarily watching areas outside of our home, but I installed cameras in each of my children's rooms to replace the video monitors we had used for a while (BebeSounds wireless that worked horribly). Is there some way to set up the Linksys Router so that only certain MAC addresses can access the forwarded ports, or perhaps add another level of password protection? I'm not the handiest guy at networking, but I can't see any functions and/or features allowing me to do this. There may be some other options and/or ideas that I don't even know exist, so any help/input/suggestions would be greatly appreciated!!!