Hello I am using arptables v0.0.3.4 in Debian Squeeze. Issuing command: aptables -A INPUT -i eth0 --opcode ! 1 -j DROP Then issuing command arptables-save produces the following: -A INPUT -j DROP -i eth0 --opcode 1 The "!" is missing from the opcode. Regards. Steven. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html