Date: Thu, 12 Sep 2002 14:43:10 +0200 From: Arie.Gerszt@student.unisg.ch To: freebsd-isp@FreeBSD.ORG Subject: nat & load balancing Message-ID: <OF57F6F3CD.F792A65F-ONC1256C32.00456915@unisg.ch>
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Hi List
Radware makes a product called Linkproof. It basically does load balancing
and automagical failover for multiple isp's for outgoing connection. it
states
it using something as smart nat. without the use of any routing protocols.
as i understand it basically nat's traffic in a way that load is balanced
and in the case of a fail of one link it just uses the other one the full
extent.
What I was wondering is, if this can be done with a FreeBSD box too, with 3
FE Interfaces. Assume following setup:
+--------- ISP 1 (static)
|
/--------\
[firewall]----| fbsd |
\--------/
+--------- ISP 2 (static)
the box should nat the internal traffic and balance them over the two (or
n) links
to the upstream providers. As I was pointed, one approach to do is having a
caching
dns server on the box with ttl = 0 and if a link down is detected, remove
that dns.
but I can't think of how to make such an approach working in the real
world.
I am wondering if somebody of you ever tried such a thing? I would like to
exchange some
further thoughts about it with people interested.
Thank you
Arie
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