As of writing this I've been running a bridging Linux box for almost two years. I started with 2.5.somewhat, when 2.5 became pretty usable (somewhen in summer 2003), and switched to 2.6 after the release. I used a bridge to bind WLan and internal Ethernet together, with having the ability to filter on the bridge using iptables. While you can filter layer 2 stuff with ebtables under kernel 2.4 alre