Advice on multiple interfaces

Chris Mason (Lists)
2006-02-17T12:41:22Z

I have decided against the solution I was working on that I referred to
in my previous post "Traffic from other firewall", it is way too messy
and would be a nightmare to debug in the future.

Instead, I have decided to devote a dual psu, dual hd machine into a
dedicated shorewall firewall to replace the m0n0wall unit as the main
firewall.
I have purchased an older Dell 2450 machine for this purpose.

I have no problems getting it working as a single interface machine, I
have lots of experience with Shorewall,  but I am looking for some
guidance on the multiple interface/multiple ISP configuration which I
have never done before.

This is not a simple (!) load balancing solution, I do not want dynamic
balancing. Let me detail the feeds and tell you what I am trying to achieve.

ISP1: Static IP, Fixed guaranteed bandwidth, expensive, want to keep for
VOIP.
ISP2: ADSL, dhcp, cheap, want to route outgoing browsing traffic so
guests and staff do not load ISP1.
ISP3: Cable internet, reserved IP, cheap, lousy quality, want to serve
internal webcam on it.

Is listing the feeds in the providers file the way to go, or should I
just establish zones for each and use rules to route? I am a bit lost
here so I need the help of the esteemed list members to put me on the
right track. It''s hard to simulate this setup in the lab so I need to
get it right from the start.

--
Chris Mason