this is the current network that I have:

UBUNTU:
  eth0:
    ip: 212.83.10.10
    bcast: 212.83.10.10
    netmask 255.255.255.255
    gateway 62.x.x.x
  eth1:
    ip: 192.168.1.1
    bcast: 192.168.1.255
    netmask: 255.255.255.0
    gateway ?

CENTOS:
  eth0:
    ip: 192.168.1.2
    bcast: 192.168.1.255
    netmask 255.255.255.0
    gateway 192.168.1.1

I basically want this:

Make specific NAT rules from the internet to specific internal servers depending on the port:

Connections incoming to port 80 must be redirected to 192.168.1.2:80

Connections incoming to port 3306 must be redirected to 192.168.1.3:3306

and so on...

I also need one NAT rule to allow the servers in the subnet 192.168.1.x to browse the internet. I need to route the requests on eth0 to eth1 to be able to exit to internet.

Can I do this on the UBUNTU machine with iptables?

Thanks!