[LINK] ACS new? submission on ISP filtering
Roger Clarke
Roger.Clarke at xamax.com.au
Fri Mar 19 11:15:56 AEDT 2010
At 9:42 +1030 19/3/10, Glen Turner wrote:
>ISPs can save significant bandwidth by hosting or peering
>with content distribution networks for those huge static
>items which do consume a lot of bandwidth.
So the http HEAD method doesn't work for such things?
(We're talking specifically of 'static' items).
>For the same reasons, ISPs seek to peer with web sites which
>generate large amounts of traffic. These peerings reduce
>the amount of traffic from transit providers which contain
>static items with significant bandwidth cost.
>
>Today I mainly see web proxies implemented in four scenarios:
> - within enterprises for accounting or for security (stripping
> out forbidden items, such as ActiveX code)
> - within school systems for limiting access to content
> (I'll note that these systems usually perform poorly, which
> deeply worries ISPs when people suggest proxies as a suitable
> solution for large-scale Internet filtering.)
> - on the Internet as a device for subverting government-imposed
> Internet filters or for allowing access to IPv4 content from
> non-IPv4 networks.
> - in front of web sites to limit the frequency with which dynamic
> content is computed. This is by far the largest use of proxies
> in the modern Internet.
Valuable stuff, thannks Glen!
--
Roger Clarke http://www.rogerclarke.com/
Xamax Consultancy Pty Ltd 78 Sidaway St, Chapman ACT 2611 AUSTRALIA
Tel: +61 2 6288 1472, and 6288 6916
mailto:Roger.Clarke at xamax.com.au http://www.xamax.com.au/
Visiting Professor in the Cyberspace Law & Policy Centre Uni of NSW
Visiting Professor in Computer Science Australian National University
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