How does one specify an IP Alias Interface, as an interface in iptables? The manual page suggests that one might be able to, but if I run a command such as: iptables -t filter -A INPUT -i eth0:0 -p tcp -s 66.229.228/24 -d xx.xx.xx.xx -j DROP I get: Warning: weird character in interface `eth0:0' (No aliases, :, ! or *). Any thoughts on this? Should I associate the alias IP, with the real interface (eth0), as far as iptables is concerned? Luke