[K12OSN] whitelist sites in lab

[Patrick Fleming]

White listing, filtering and caching/proxy can be done with Squid and 
SquidGuard. I haven't done it with K12LTSP, but I run it at home. You 
just have to make sure that you block any potential outgoing http 
requests so your kids don't run a proxy out past your filters.

Todd O'Bryan wrote:
> I've decided that it's far easier to just whitelist the fairly short
> list of sites I want my students to be able to go to inside my lab
> than to try to thwart their attempts to get around the school
> filtering software. I teach computer programming, so I don't need them
> to be able to get to sites for research (and, in fact, it'd be nice to
> be able to say, "Sorry, my lab won't let you go to that site to do
> your research for Spanish class." when kids ask if they can use one of
> my computers because the library's closed).
> 
> What's the most painless way to do this? Can I just put a list of
> allowed sites somewhere and have the server only go to those sites
> somehow?
> 
> Thanks,
> Todd
> 
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