Sorry if everyone gets this twice, this one is a second posting when I realized this was a closed list. Original question: Is it possible to use iptables with a device alias (ex.. eth0:1)? I tries to add a filter rule and got an error: % iptables -t filter -I INPUT -i eth0:1 -j ACCEPT Warning: wierd character in interface `eth0:1' (No aliases, :, ! or *). If i list the rules, it's listed, but it doesn't appear to be working. I was wondering if someone had a definite answer. TIA Steve