On Sun, Oct 17, 2010 at 09:15:18PM +0200, Mike Hoffs wrote:
> > Hi Mike,
> > 
> > > Is it possible to implement at forwardfor except ipv6 ?
> > 
> > It should not be hard to do. However, as noted in the source, it's a bit
> > useless, because while IPv6 is used over the net, it's particularly rare
> > on the local network, and the "except" keyword is only used to reference
> > your local SSL proxies. Most often, it will only contain 127.0.0.0/8 or
> > your local LAN address.
> 
> I know but then we need two entry's for haproxy for one single ipv6 address 
> that we tunnel to ipv4.
> 
> > 
> > > Now it is only possible to except a ipv4 address. If that is possible we
> > can also make the legacy stuff with ssl ipv6 reachable.
> > 
> > In my opinion, this is independant. You can very well have your SSL reverse
> > proxy receive IPv6 traffic and forward it to haproxy on 127.0.0.1 (IPv4).
> > 
> > Do you have a concrete example where it's really needed ?
> 
> Yes;
> 
> Haproxy is configured to listen on ipv6 at port 80, both should be reachable 
> (80 & 443). With stunnel we capture 443 traffic, and tunnel it to the single 
> entry in haproxy. Haproxy is configured with forwardfor, stunnel also. Now we 
> have 2 ipv6 in the headers, and it would be nice to except the local ipv6. 
> With the solution to handle it on the local ipv4 should do the trick but with 
> many ssl hosts its a bit messy. With single entry we keep te haproxy config 
> clean.

OK I see. I agree with you that if your setup is IPv6-only, then it makes
sense. It's not a common setup though. I'll try to figure out the required
changes to support that.

Regards,
Willy


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