IPP Mail Archive: Re: IPP> SEC - IPP and firewalls

Re: IPP> SEC - IPP and firewalls

Michael W. Bringmann (michael@rd.qms.com)
Mon, 30 Jun 1997 16:27:59 -0500

[snip]
> The kind of restrictions that a firewall might impose include:
>
> - Only requests from a set of known TCP/IP address ranges
> - Only one copy of each document

Why would a firewall restrict the number of copies of a document?
Would the firewall scan the data stream for the IPP 'copies' attribute
and abort the document if it were present?

> - Only black & white printing

Why and how would a firewall restrict an image to black & white?
This implies examination of the actual document content to me,
something which you later state is probably not going to occur.
Jobs might be limited to black & white due to document size
constraints, but not just because they are color.

> - Only documents up to a certain size
> - No multiple document jobs
> - No print-by-reference jobs
>
> I expect that it is unlikely that the firewall software would be able to
> check for features specified in the actual document content (e.g. as
> specified in a Postscript statement).

[snip]

Thanks.

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Michael W. Bringmann EMail: michael@rd.qms.com
Senior MTS Web: http://www.qms.com
Mail: QMS Incorporated Phone: (334) 633-4300 x1765
Mobile, AL, 36688, USA
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