Load balancing firewall with ubuntu server

[Alan Robertson]

Neal McBurnett wrote:
> On Mon, Oct 15, 2007 at 09:14:52AM +0200, Soren Hansen wrote:
>> On Sun, Oct 14, 2007 at 09:02:59PM +0200, carlopmart wrote:
>>> Somebody knows a good tutorial or howto where explains how to setup a
>>> load balancing/failover firewall with ubuntu?? Is it possible to do
>>> it?? I need the same funcionalities as carp with pf does
>>> (http://www.openbsd.org/cgi-bin/man.cgi?query=carp&apropos=0&sektion=0&manpath=OpenBSD+Current&arch=i386&format=html)
>>> but using ubuntu.
>> Currently, AFAIK there's no way to share conntrack tables between two
>> machines. There will be in Ubuntu's next release (Hardy Heron), based on
>> http://www.netfilter.org/projects/conntrack-tools/index.html
> 
> I'm no expert in this (!) but I passed it on to Alan Robertson
> (architect of the Heartbeat project), who noted another way to deal
> with some of the underlying issues that works well for some folks:
> Cluster IP (using a single IP address and multicast mac addresses).
> 
> It is described in a book that Alan recommends by Karl Kopper that
> probably covers other things also related to your interest: "The Linux
> Enterprise Cluster: Build a Highly Available Cluster with Commodity
> Hardware and Free Software."
> 
> See http://www.linux-ha.org/ for some more information from a
> "heartbeat" centric viewpoint.  Alan also plans to cover it at
> some point in his blog at http://techthoughts.typepad.com/
> 
> Neal McBurnett                 http://mcburnett.org/neal/

The book covers Linux Virtual Servers which are full-fledged load 
balancers.  Cluster IP is not covered in the book.  Sorry for the confusion.

-- 
     Alan Robertson <alanr at unix.sh>

"Openness is the foundation and preservative of friendship...  Let me 
claim from you at all times your undisguised opinions." - William 
Wilberforce