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Re: remote 403 error through squid

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On Sun, 11 Sep 2005, Henrik Nordstrom wrote:

> On Sat, 10 Sep 2005, Merton Campbell Crockett wrote:
> 
> > One element in common with this site and the one in the Bugzilla report
> > mentioned by Henrik Nordstrom is that they both use the Apache Advanced
> > Extranet Server 2.0.48.
> 
> Only 2 of 3 so far..
> 
> > I would suspect that mod_rewrite is being used instead of mod_proxy to
> > provide access to internal content.  Squid is appending a slash and is
> > causing the security check to match the regex ^.*/$.  The following will
> > work, as well. :)
> 
> Interesting theory, but does not explain the inverse max-age dependency...

No, it does not.

Is there an inverse max-age dependency?  The behaviour of the VATLogic and 
Mufreesboro web sites occurs regardless of max-age.  Both sites return a 
403 (Forbidden) status when the URL references DocumentRoot.

The VATLogic site will return a 403 (Forbidden) status for any URL that 
explicitly references a directory, i.e. the URL is terminated by a "/".  
Neither the directory nor the path to the directory need exist.

Both sites are using the Apache-AdvancedExtranetServer.  The name suggests 
that this is a variant of the Apache HTTP Server configured to sit on the 
organisation's security perimeter and provide access to internal web 
content.  It, also, suggests that Apache's mod_rewrite module is being 
used to implement standard security policies and access control.

There may be an inverse max-age dependency but in these two instances I 
suspect that it is a "red-herring".  There is a simpler answer.  Access is 
being denied because the request appears to be attempting to retrieve a 
directory listing.


Merton Campbell Crockett
 

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