I am wanting to know if its possible to setup a Linux Box that will
allow me to connect 4 ADSL Connections to my Internal Network, and use
only 1 internal gateway. I have attached a basic diagram on what I
would like to achieve, As you will see from diagram, I have used false
IP’s. Essentially, what I would like to do is have the following ports
from the internal network go…
SMTP (25) – eth1
FTP (21) eth2
HTTP (80) eth3
VPN (5000) eth4
And similar if you are on the internet,
I want to open port 25 (SMTP) on all the internet connections and have
that forwarded to one Internal IP Address, and open port 80 (http) on
eth3, and open port 5000 (VPN) on eth4.
eth2 is purely for Staff to use FTP in or Out.
So Basically, the questions are
1. Is it possible?
2. If Possible, What software should I be using? And is it hard?
3. If it’s hard, can someone out there do it, and I pay you for it?