Stan Hoeppner:
> Wietse Venema put forth on 10/28/2009 5:46 AM:
>
> > You don't need multiple network cards. You simply need a box with
> > multiple network addresses.
>
> For example, on Debian 5.0 (likely similar on other *nix distros) you
> could do something like this:
>
> /etc/network/interfaces
>
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet static
> address 200.1.1.30
> netmask 255.255.255.0
> network 200.1.1.0
> gateway 200.1.1.1
>
> auto eth0:0
> iface eth0:0 inet static
> address 206.1.1.65
> netmask 255.255.255.0
> network 206.1.1.0
> gateway 206.1.1.1
>
> auto eth0:1
> iface eth0:1 inet static
> address 65.41.216.221
> netmask 255.255.255.0
> network 65.41.216.0
> gateway 65.41.216.1
>
> This will bind 3 IP addresses of 3 different class C networks to one
> physical ethernet device (NIC). You may or may not need to play with
> your local routing table to make sure that each Postfix instance sends
> its traffic out the correct interface.
For other systems, you can ask your favorite search engine for
"freebsd interface alias", "openbsd interface alias", and so on.
Wietse
