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North American Network Operators Group

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Re: backbone transparent proxy / connection hijacking

  • From: Eric Wieling
  • Date: Tue Jun 30 13:52:52 1998

This is just my take on the issue.

@Home caches.  AOL caches.  Browsers cache.  (does the Direct/PC
service cache?), many, many ISP's cache.  Many companies cache. 
Caching is a fact of life.  From my point of view any advertiser that
does not take caching into account is screwing themselves and their
customers.  We cache.  I try to configure our cache to err on the side
of fresh content, rather than err on the side of hit rates.  

Every once in a while we get a customer complaint about a specific
site and we address the issue on a case by case basis.  So far
complaints are fairly uncommon.

We are not a backbone provider.  Our cache is only available to
customers that subscribe to our "security" services.  (Just a note
most of our customers have less then 300 users and although our
firewall services are not air tight, I think we do a decent job of
protecting our customers.  If these customers did not have this
service from us, most of them would have no protection at all.  I'm
just amazed at how much smaller business just don't seem to care about
network security.)

Making your site cache friendly is not rocket science.  Putting
reasonable expires information on objects is not tough.  Telling your
web server to set the expires as a percentage of the age of the
document is supported in some servers.  Using client side forms
validation is not really that much tougher than using server side
validation.  Many SSI web pages are not really dynamic.  We use SSI
extensively on our web sites to create a consistent look and feel.  Of
course, some SSI pages are dynamic and should not be cached.  

I do think that it's utterly unacceptable for a backbone provider to
force their customers to use their cache.  I do, however, wish that
more backbone providers would provide caching services to those people
what want the service.

--Eric Wieling

>>> John Fraizer <John.Fraizer@EnterZone.Net> 6/29/98 6:20:31 PM >>>

So, If someone is using site exec, etc in their code, and their
provider/webmaster/mother didn't set up Progma: nocache, they're
effectively screwed...erm...cached, right?  


Fantastic.  So, lets say I'm Joe Banner Advertizer.  Company X has
paid me
present their banner.  They wanted to limit the amount of money they
so, they had me code my servers to only display their banner X times
day since I bill them on impressions.  Backbone provider Z installs
one of
your boxes.  By default, no matter how many connections on the
limited....erm...client side of the box are initiated to retrieve a
banner from our banner-farm, you send them Company X until the cache

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