ebtables: Ebtables (Ethernet Bridge frame table administration tool)
ebtables:
ebtables: Ethernet bridge tables is a firewalling tool to transparently filter
ebtables: network traffic passing a bridge. The filtering possibilities are
ebtables: limited to link layer filtering and some basic filtering on higher
ebtables: network layers. This tool is the userspace control for the bridge
ebtables: and ebtables kernel components. ebtables can be used together with
ebtables: the other Linux filtering tools, like iptables. There are no known
ebtables: incompatibility issues.
ebtables:
ebtables: See:  http://ebtables.sourceforge.net