Before I know brigde-utils, I really don't know the bridge function of linux kernel. But when I know it, I'm starting wondering what it can be use for? I said, I read articles, I love google, so, I

All conntrack entries is saved at the system conntrack database. http://www.frozentux.net/iptables-tutorial/iptables-tutorial.html#THECONNTRACKENTRIES   Reference: 1)http://www.frozentux.net/iptab