iptables, masquerading and ip-aliasing

[Anders Lennartsson <abel@foi.se>]

Hi

Is it possible, with iptables, to do masquerading or NAT from an
ethernet-aliased ip-address?
Or will the returning traffic originate from the physical address of the
nic?
As I understand this was not possible with ipchains and earlier tools.

I'm asking because I have two real ip-addresses :) (assigned by my
ADSL-provider)
and would like to manage with only one NIC connected to the incoming
cable.

by the way, any recommendations for multiport nics on a Debian woody
system?

cheers,
Anders