How does assigning alias IP address work? I have one network jack coming into my server room. eth0 10.10.10.10 I have two servers with public IP address. this assigns them, right? ifconfig eth0:10 192.168.1.10 netmask 255.255.255.0 ifconfig eth0:11 192.168.2.11 netmask 255.255.255.0 iptables -t nat -A PREROUTING -d 192.168.1.10 -i eth0 \ -j DNAT --to-destination 10.10.10.11 iptables -t nat -A PREROUTING -d 192.168.2.11 -i eth0 \ -j DNAT --to-destination 10.10.10.12 When a mail or web request is made from the internet. How does it know where the servers are? thanks John