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Re: Firewall problems with RDF MIME type?

From: Phil Archer <phil.archer@icra.org>
Date: Mon, 18 Apr 2005 10:39:20 +0100
Message-ID: <004c01c543fb$208ad970$63601052@PHILXP>
To: "Dirk-Willem van Gulik" <dirkx@webweaving.org>
Cc: "SWIG" <semantic-web@w3.org>

That sounds like a very plausible reason for the problem and why the 
solution worked.

If the firewall is unaware of the RDF MIME type it would guess the RDF 
instance as being XML (which it was as well but that's by the by). 
Therefore, even though the MIME type was correct there was a mismatch. Now 
it's set as text/xml (I know it should be application/xml) and all is well.

This might also point to why some regular HTML pages were being blocked by 
the firewall since they all carried a link to a resource of an "unknown" 
MIME type??

Phil.


----- Original Message ----- 
From: "Dirk-Willem van Gulik" <dirkx@webweaving.org>
To: "Phil Archer" <phil.archer@icra.org>
Cc: "SWIG" <semantic-web@w3.org>
Sent: Monday, April 18, 2005 10:21 AM
Subject: Re: Firewall problems with RDF MIME type?


>
> On Fri, 15 Apr 2005, Phil Archer wrote:
>
>> I wonder though how a firewall goes to jump because of a MIME type...
>
> A fair number of content-inspecting firewalls look at the content of the
> steam; guess what it is and then match that wiht a mime type. If there is
> a mismatch, says GIF or ZIP mimetype with an executable or MS pif file -
> then it is blocked.
>
> Dw
>
> 
Received on Monday, 18 April 2005 09:43:52 GMT

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