North American Network Operators Group|
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Re: DNS Blocking
> > email@example.com ("Dan Mahoney, System Admin") writes: > > > >> What I was basically asking for was a "silently drop queries for X-domain" > >> option. But one doesn't exist in bind. > > > > take a look at www.as112.net to see what happens to queries for > > 10.in-addr.arpa and its brothers. you can easily set up a zone > > There weren't rfc1918. Doesn't matter. But in order for this trick to work: - The things sending you queries must be able to receive your replies. I believe you said that source addresses are spoofed, so this may not be the case. - The things sending you queries must be smart enough to follow the NS referral in the response. If I wanted to silently drop DNS queries based on the query name, I might use FreeBSD's divert socket and a Perl script to examine the queries. Not sure well that would scale though. Duane W.