computer/software ?

[jasondbaker]

If you walk outside your house sometime and find strange looking chalk marks on the sidewalk, those are war chalk markings. The lesson, really focus on securing your wireless network when you first setup the device.

Personally I don't recommend firewall software that runs on your computer. I would go on ebay and buy an older Watchguard SOHO firewall, or something similar. Another option is to install something like a Smoothwall firewall. Just take an old PC (I use an old P2/300 system), two network cards, and install the Smoothwall (free) software on it. A separate firewall provides more flexibility and easier network troubleshooting.