1) you can manually filter domains in your router, so it will affect all computers on the network. The router setup is generally accessed through a browser by typing this into the address bar: 192.168.1.1, or 192.168.1.0, or 192.168.0.0. Default user and password is usually admin, admin – check your manual if not, and be sure to change it to something else you’ll remember. Somewhere in the menu there will be an option to filter domain names. Generally you just need the .com address that you want filtered (example: live.com). This is best for domains that your other filtering software might allow but that you don’t want. It is not a comprehensive solution at all though … there are millions of domains you’d have to enter and keep updated daily to use it as a comprehensive one. It’ just good if your kids have figured out a way to get around filtering to access a certain domain on which they are hooked (for example certain chat sites, etc).

For example, live.com and search.yahoo.com incidentally are good ones to filter if you have kiddies using the computer because they doen’t have a very good “safe search feature. Google does have a good safe-search filter. If you use the K9 filter it will enforce google safe search, but not safe searches on live.com.

2) DNS filtering – quite easy, and there’s a free one called opendns (see http://www.opendns.com). It filters content before it gets to your house based on criteria that you specify, and is extremely easy to setup. Just go to opendns.com and read the how-to section. Unfortunately I’ve found it quite inadequate compared to say K9, it errors very much on the side of free expression, and being free it doesn’t get updated frequently but it doesn’t hurt and I have not noticed a slow-down in my connection and transfer speed.