[Chugalug] Need traffic filter solution

Dave Brockman dave at brockmans.com
Wed Nov 7 14:08:35 UTC 2012

Hash: SHA1

On 11/7/2012 8:57 AM, Benjamin Stewart wrote:
> I don't think that's right. OpenDNS can only redirect queries that
> are directed towards it, so no, if you've hard-coded another DNS
> provider on your machine, that machine would not be filtered.

The question was whether or not OpenDNS still blocks pr0n if you
hard-code Google's DNS servers.  OpenDNS servers still block the pr0n,
but the hard-coded Google DNS entry isn't asking.  OpenDNS still
works, it has been circumvented however.  The question wasn't whether
or not a particular machine can reach pr0n.... More of a "thump" on
John's head for asking such silly questions that are rather easy to
test for ones self in a matter of about the time it took to compose
the email itself.

> You can, however, write a firewall rule that funnels all DNS
> requests back to OpenDNS or wherever you want them to go.

I usually find it easier to block DNS queries (udp/53 AND tcp/53)
outbound except to your preferred servers (if External) or completely
if Internal.  I have yet to find a DNS ALG that properly parses DNSSEC
correctly, adding a redirect layer only adds to the confusion.  YMMV.



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