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Date: Mon, 25 Apr 2011 20:04:57 +0200
From: Piotr Meyer <>
Subject: Re: new soft: conntrack, ucarp

On Mon, Apr 25, 2011 at 07:52:36PM +0400, Vasiliy Kulikov wrote:
> I'll use conntrack in numerous virtual environments in testing purposes
> (not to test conntrack itselt ;)).  Unfortunately, I'll likely use
> neither ucarp nor conntrackd.  I heard from CMC MSU sysadmin that they
> use ucarp for pf (FreeBSD firewall) with pfsync (analog of conntrackd

I use ucarp for years. It's lovely piece of software - small, reliable,
customizable (ucarp calls shell scripts when enters in master/backup
state - they can virtually do anything - add extra addresses or routes,
bring up daemons, etc. etc.). ucarp has also one delicious feature - 
when their eth link is down they don't try to enter in master state, 
assuming that disappearing master is result of local (link) problem. 

Works fine for linux-based, redundant routers and proxies.

Piotr 'aniou' Meyer

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