[SAC] errors with Trac

[Christopher Schmidt]

On Thu, Oct 01, 2009 at 05:33:10PM -0400, Paul Spencer wrote:
> We replaced our router with a fancy new dual-wan VPN router and it was  
> configured to load balance outgoing traffic between a DSL and a cable  
> connection (each having a different external IP address, one static and 
> one dynamic).  I thought this happened some time before we started  
> experiencing this problem and had forgotten about it.
>
> The solution appears to be to direct all outgoing traffic to the osgeo  
> servers trac, www and svn to use only one of the connections.  It is  
> still unclear what is different between OSGeo's setup and the setup on 
> openlayers.org and our own trac/svn but I suspect that somehow the 
> authentication is being done with some affinity to the user's IP address, 
> which in our case was changing essentially randomly between subsequent  
> requests.  I have not confirmed this

I'm surprised that your own trac and the OL trac weren't equally affected; in
my experience, I've always had trac get cranky when I switch connections, but
since I only do it a coule times a day, that's obviously not particularly
scientific.

Trac version may also play a role; if your trac is newer, the behavior
may have changed.

> I guess one question that could be asked is if any configuration change 
> related to authentication happened recently that would be related to 
> linking IP address with authenticated sessions.

I'm not aware of any changes to trac auth in the past 2-3 months. (Beyond
that, I also can't think of anything that would fit your description,
but there were some changes possibly when we did the postgres changeover
that could have affected things.)

Regards,
-- 
Christopher Schmidt
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