There are probably many ways to do this, here is one that I
know will work:
use a Sun box running Solaris, with a Quad-Ethernet Card.
Install a commercial firewall product. Plug in each server
into its own ethernet port on the Quad-ethernet card.
Configure the firewall product to allow traffic between the
servers as you described. If you were to use CheckPoint's
Firewall-1, assuming you had your config info all worked out,
and the security policy thought out. You could have it done
in an hour.
> From postmaster @
com Mon Oct 14 14:11:13 1996
> X-Sender: lazar @
> Mime-Version: 1.0
> X-Priority: 1 (Highest)
> Date: Mon, 14 Oct 1996 14:51:22 -0400
> To: firewalls @
> From: Irwin Lazar <lazar @
> Subject: Firewall Question
> Greetings all.
> If anyone has any recommendations for a firewall to accomplish the
> following, please let me know. Also, is this technically feasable?
> Here is the scenario:
> Servers A, B, C, D
> Each server is on a seperate network.
> Servers A, B, C need to pass data to server D, and vice-versa.
> Networks A, B, C must not be able to talk to each other.
> All network topology is 10Mbps Ethernet. There won't be a tremendous amount
> of traffic going through the firewall, mostly just TCP.
> Thanks in advance,
> Irwin Lazar
> lazar @
> Network Evolutions, Inc.