More Home Network Security

In my post yesterday I said that you need to have something to protect your computers at home from the evils of your corporate network.  I should mention the thing I'm using:  the Norton Internet Security product.  It's annoying but it gives me a really good picture of what's going on with the networking on my system.  Whenever any program on my computer tries to connect to the network, it pops up and asks me if that's OK... whenever any connection attempt comes in to a program on my computer, it asks me if that's OK.