[OPLINTECH] OpenDNS content filter question

[Chad Neeper]

I've used (and liked) OpenDNS as a reliable DNS service. However, I just 
tonight set up the free content filter service for my home network to 
evaluate it as an alternative to DansGuardian. With the OPLIN/OpenDNS 
content filter contract in mind, I've run across a bit of a conundrum 
and was wondering how libraries using OpenDNS were handling it:

The issue I'm having is with image search engines. Google's Image Search 
was my test case. With OpenDNS set to filter out the nasty sites, I did 
a simple image search for "nude". Since I was only looking at Google's 
cached images hosted at the google.com domain, I was naturally not 
restricted in any way. Only when I tried to actually visit the source 
site did OpenDNS step in and prevent me. To eliminate the loophole, I 
could presumably enable the option in OpenDNS to block image search 
sites, but that would presumably also eliminate the very valuable image 
search service.

Due to the nature of how OpenDNS blocks sites using DNS, it seems to me 
that there is a glaring hole here. The problem is certainly big enough 
and so easily duplicated that my libraries, which have been very happy 
with DansGuardian, are going to have a big issue with it.

Is there a feature in the contracted Enterprise version that helps to 
close this loophole? If the answer is, as I suspect, "NO", then how are 
your libraries keeping your young adults from simply going to Google 
Images and doing their potentially offensive searches?


-- 
______________________________
*Chad Neeper*
Senior Systems Engineer

*Level 9 Networks*
740-548-8070 (voice)
866-214-6607 (fax)

/Full LAN/WAN consulting services -- Specialized in libraries and schools/
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