[OPLINTECH] OpenDNS content filter question

Chad Neeper cneeper at level9networks.com
Mon May 7 11:48:14 EDT 2012


I have two things to report:

1) I'm a leper. There are a lot of nice/good people that talk to me, but 
apparently not in public. LOL!
2) The general consensus seems to be that there isn't currently a good 
working solution to block image search engine "previews" with OpenDNS. 
Considering how simple it was to bring up large-sized "preview" images 
via Google's Image Search even with OpenDNS filtering turned on...that's 
a total deal-breaker. With my libraries used to and loving Dans 
Guardian, I'd be tarred and feathered if I switched to OpenDNS. 
Honestly, I'm pretty bummed about that. Switching to the content filter 
OPLIN has put its money behind would have saved my individual libraries 
money and would have simplified things for me.

Thanks, all!
Chad


______________________________
*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/

On 5/3/2012 11:26 PM, Chad Neeper wrote:
> 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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