I am not sure if this question belongs here or not. Please move to another category if needed.

I would like to find out if anyone uses firewall software at home on there Mac to monitor there home network. Since most typical routers like Linksys, Asus, etc.. only offer basic network and firewall control, I need to something that goes a little beyond basic settings.

When you have teenagers at home that have iPods and laptops, I am looking for firewall software so I can monitor there activity and block sites. Again, I am aware that most routers have built in firewall and network control but it is usually limited.

Any suggestions?