From owner-freebsd-isp Thu Sep 12 5:43:25 2002 Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 372ED37B400 for ; Thu, 12 Sep 2002 05:43:22 -0700 (PDT) Received: from stud_2.unisg.ch (stud2.unisg.ch [130.82.110.26]) by mx1.FreeBSD.org (Postfix) with ESMTP id 24FF043E6A for ; Thu, 12 Sep 2002 05:43:17 -0700 (PDT) (envelope-from Arie.Gerszt@student.unisg.ch) Subject: nat & load balancing To: freebsd-isp@FreeBSD.ORG X-Mailer: Lotus Notes Release 5.0.6a January 17, 2001 Message-ID: From: Arie.Gerszt@student.unisg.ch Date: Thu, 12 Sep 2002 14:43:10 +0200 X-MIMETrack: Serialize by Router on Stud_2/student/UNISG/CH(Release 5.0.6a |January 17, 2001) at 12.09.2002 14:43:21 MIME-Version: 1.0 Content-type: text/plain; charset=us-ascii Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message