Arptables is used to set up, maintain, and inspect the tables of ARP rules in the Linux kernel. It is analogous to iptables, but operates at the ARP layer rather than the IP layer. Currently, only support for specifying hardware addresses for Ethernet is available. This tool is not luser-proof: you can specify an Ethernet source address and set hardware length to something different than 6, f.e. arptables was written by Bart De Schuymer based on code from iptables Arptables Frequently (and less frequently) Asked Questions: http://ebtables.sourceforge.net/arptables-faq.html Note: an /etc/rc.d/init.d/arptables sysv-style script is included.