netdev - Re: nonlocal

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Message-Id: <201006262242.16346.michal.humpula@hudrydum.cz>
Date:	Sat, 26 Jun 2010 22:42:16 +0200
From:	Michal Humpula <michal.humpula@...rydum.cz>
To:	Simon Horman <horms@...ge.net.au>
Cc:	netdev@...r.kernel.org
Subject: Re: nonlocal_bind & IPv6

On Saturday 26 of June 2010 15:25:40 Simon Horman wrote:
> On Fri, Jun 25, 2010 at 09:10:08PM +0200, Michal Humpula wrote:
> > Ok, more detail example.
> > 
> > Let on each node be an apache (just for an example), and you configure
> > VirtualHost for specific IP. So when node A fails, keepalived move IP to
> > the node B and everything is still running. No need for restart of apache
> > or anything else. There is a probably a better solution, but I can't find
> > anything more simple than the posted patch:)
> 
> Not an answer to your original question, but that sounds like a problem
> that can be resolved using IP_TRANSPARENT. Although I have only tested
> that feature in conjunction with IPv4, it seems to support IPv6 too.
> 
> See Documentation/networking/tproxy.txt

Thanks for redirection. I don't think that IP_TRANSPARENT is suited well for my problem, 
but I did find the IP_FREEBIND in the process. Unfortunately it seems that both are 
enabled only for IPv4 and IPv6 mapped addresses. 

So, is there any reason why IP_FREEBIND or nonlocal_bind sysctl is not in current IPv6 
kernel implementation?

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