BufferZone's an interesting program. I've tried it and it is a lot like DefenseWall, but works on 64-bit systems. It seems it's default settings are somewhat weak, but are easily increased to block almost all threats. However, according to Softpedia and their website, it hasn't been updated since November 13, 2012, and the link to their forum just redirects to their homepage? Does anyone use this regularly, and does anyone know if it is still developed?