Firewall Rules

[Victor Padro]

Hello there!

I am researching some NAT/firewall rules in order to implement a ubuntu
6.06LTS box as a firewall/router with only one Public IP...the catch is that
i want to use a couple of servers behind the firewall using web/ftp/mail
services, using their own ports(80, 443, 21, 25, etc.) Can this be done?  i
read something about DNAT but i am confused if i have to change the servers
ports to something like 1050, 1053, 10023, etc.  any suggestions about t?

thanks.
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