SNAT / MASQUERADE to a different IP

["Eduardo Bejar" <wonka@xxxxxxxxxxx>]

Hi,

I have this setup:

LAN with one Fedora Server as gateway/email server.

Currently I masquerade all LAN traffic to use the same IP as the Server:

iptables -t nat -A POSTROUTING -s $LAN -o eth0 -j MASQUERADE

So, LAN and mail server use both the same IP address. This works fine, but
now I´d like to make the LAN use a different IP address than the mail
server, so I´d like to know how can I do that?

I tested SNAT, like:

iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to $IP

but with this, LAN and mail server now use $IP both, and what I´d like to do
is assign different IP addresses: one for the LAN and other for the mail
server.

Any thoughts about this will be very appreciated.

Thanks!

Edo