If you're looking for a good home network monitoring system, I have recommended OpenDNS in the past (and still do... it's a great software-based filtering/monitoring service). If you need something more (and dare I say easier), I have another recommendation for you. Apart from the fact that this recommendation is hardware-based, there's one other clear difference between it and OpenDNS... it's not available yet. In fact, it won't be available until September of this year. So why am I telling you about it now? Good point. I'm not in the habit of recommending products that aren't out yet. However, this one looks worthy of a pre-release recommendation primarily to give you a heads-up, so you can pre-order before everyone else does. My bet is this will be a popular item.
The name of the product, by the way, is SkyDog. Rather that me going on and on about it, I thought I would simply share their 3-minute promotional video, walking you through the features.
For more information, visit their site here.
Note: In the video above, as well as on their site, they suggest that you replace your existing wireless router with their device. While this will obviously work, it isn't necessary. I use an 802.11ac Airport Extreme (Apple) and love it. I wouldn't think of replacing it with anything. Instead, I plan to place the SkyDog device between the Airport Extreme and my ISP. This will accomplish the same filtering/monitoring, but allow me to use the wireless router of my choice.