[natep]

As someone tech-savvy and having used WireShark, even, I'm curious to know from my sibling commenters, what are you thinking? Of course you start by buying hardware or modifying a router. Parent comment is specifically asking for "good information" and something that "clearly defines how this is done." IMO, xfalcox and lewiseason come closest to actually answering the question, because their links mention specific software.

But simply installing software isn't enough, it needs to be configured. How does one set up OpenWRT or WireShark to filter for this kind of information? What pitfalls might one encounter? Do you need a CS degree in order to interpret the data? What keywords should one use when searching for more information?

With vague answers like the ones so far, you're just making it seem more difficult and intimidating for anyone that has little to no experience in this area. If we want people to be more concerned about their privacy, it needs to be as easy (or easier) for people to take control of their information as it is for them to give it away.

Edit: smtddr has the right idea, thumbs up. Should have hit refresh one more time before posting.