ip aliasing

["John Black" <black@xxxxxxxxx>]

i'm trying to setup my firewall to do ip aliasing.  i have two private ip 
address that i would like aliased.

if i run the command:
ifconfig eth0:0 10.10.10.11 (public address) netmask 255.255.255.0

then in my firewall script i have:
   iptables -t nat -A PREROUTING -d 192.168.180.181 -i eth0 \
               -j DNAT --to-destination 10.10.10.11

is this right?  since eth0 is the address connecting the firewall to the 
internet?

thanks
john